CN104238850B - Display device and electronic equipment with touch detection function - Google Patents

Display device and electronic equipment with touch detection function Download PDF

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Publication number
CN104238850B
CN104238850B CN201410253990.XA CN201410253990A CN104238850B CN 104238850 B CN104238850 B CN 104238850B CN 201410253990 A CN201410253990 A CN 201410253990A CN 104238850 B CN104238850 B CN 104238850B
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CN
China
Prior art keywords
touch detection
touch
display device
signal
driving electrodes
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Active
Application number
CN201410253990.XA
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Chinese (zh)
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CN104238850A (en
Inventor
野口幸治
小松英敏
寺西康幸
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Japan Display Central Inc
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Japan Display Central Inc
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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/13338—Input devices, e.g. touch panels
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136286—Wiring, e.g. gate line, drain line
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
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    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
    • G06F1/3206—Monitoring of events, devices or parameters that trigger a change in power modality
    • G06F1/3231—Monitoring the presence, absence or movement of users
    • G—PHYSICS
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    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
    • G06F1/3234—Power saving characterised by the action undertaken
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    • G06F1/3262—Power saving in digitizer or tablet
    • G—PHYSICS
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    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
    • G06F1/3234—Power saving characterised by the action undertaken
    • G06F1/325—Power saving in peripheral device
    • G06F1/3265—Power saving in display device
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    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
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    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
    • G—PHYSICS
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    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3674—Details of drivers for scan electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3685—Details of drivers for data electrodes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04108—Touchless 2D- digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface without distance measurement in the Z direction
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0421—Structural details of the set of electrodes
    • G09G2300/0426—Layout of electrodes and connections
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0291—Details of output amplifiers or buffers arranged for use in a driving circuit
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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    • G09G2310/0264—Details of driving circuits
    • G09G2310/0297—Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate

Abstract

A kind of display picture that can suppress is provided and the display device and electronic equipment with touch detection function of image retention occurs.The above-mentioned display device with touch detection function possesses：Control device, to carry out image display control in a manner of the image display function of display function layer is played based on picture signal under normal operating mode, and carry out touch detection control；Touch detection portion, under normal operating mode, based on the detection signal from touch detection electrode, detect the position of the object near to or in contact with touch detection electrode；And touch detection control unit, in a sleep mode, detection object to touch detection electrode near to or in contact with.In a sleep mode, if touch detection control unit detects object proximity or contact touch detection electrode, pixel electrode control is defined current potential by control device, and touch then is supplied into driving electrodes with drive signal.

Description

Display device and electronic equipment with touch detection function
Technical field
The present invention relates to can detect the outside display device and electronic equipment with touch detection function close to object.
Background technology
In recent years, be referred to as so-called touch panel, the outside touch detecting apparatus close to object can be detected closed Note.Touch panel be used to install (so-called external hanging type) in the display devices such as liquid crystal display device or integration is (so-called It is embedded) the display device with touch detection function.Also, the display device with touch detection function by make it is various by The displays such as button image are on the display apparatus, defeated so as to which touch panel is entered into row information instead of common mechanical botton Enter.This display device with touch detection function with touch panel due to do not need keyboard, mouse, as keypad it is defeated Enter device, therefore in addition to computer, also there is use to be expanded to portable phone and this portable information of tablet personal computer The tendency of terminal etc..
The display device with touch detection function used in electronic equipment as portable phone and tablet personal computer, In addition to being shown with progress image and carrying out the usual operator scheme of touch detection, in order to reduce power consumption, further preferably have and work as When not operated in certain time, stop image and show and stop the sleep pattern of the operation in each portion.
For example, a kind of capacitive touch panel has been recorded in patent document 1, it is defeated when what is operated in normal mode When entering operating position detection unit and not detecting input operation within specified time limit, the operation of input operation position detection unit stops Only, multiple electric capacity-time converting unit and input identifying unit are changed into the sleep pattern of intermittently operated, when in sleep pattern When the input identifying unit of lower intermittently operated is determined as input operation, input operation position detection unit is changed into the routine of operation Pattern.
Citation
Patent document
Patent document 1：Japanese Patent Laid-Open 2011-44004 publications
The content of the invention
Invention technical problems to be solved
Capacitive touch panel described in patent document 1 is that a kind of installation forms external hanging type band in the display The touch panel of the display device of touch detection function, it is not to form touching for the embedded display device with touch detection function Touch panel.
Embedded with the display device of touch detection function, when being changed into normal operating mode by sleep pattern, In the presence of it is a kind of embedded exclusive the problem of, i.e. display picture preferred suppresses it is possible that image retention (baked I pays I) This image retention.
Patent document 1 record capacitive touch panel due to be it is a kind of composition external hanging type with touch detection function The touch panel of display device, and it is not the touch panel for forming the embedded display device with touch detection function, therefore Do not consider display picture it is possible that image retention it is embedded exclusive the problem of.
The present invention is the invention made in view of the above problems, and its object is to provide to suppress in display picture Produce the display device and electronic equipment with touch detection function of image retention.
Solves the technical scheme of technical problem
The display device with touch detection function of the present invention is that there is one kind progress image to show and carry out touch detection Normal operating mode and shown without image and carry out the display with touch detection function of the sleep pattern of touch detection Device, possess：Viewing area, multiple pixel electrodes are configured to array-like on substrate；Driving electrodes, with pixel electrodes phase To setting and being divided into multiple；Touch detection electrode, be oppositely arranged with above-mentioned driving electrodes and touch detection electrode with Electrostatic capacitance is formed between above-mentioned driving electrodes；Display function layer, there is the image of display image on above-mentioned viewing area to show Show function；Control device, in above-mentioned normal operating mode, according to picture signal in above-mentioned image electrode and above-mentioned driving electrodes Between apply display driving voltage, and carry out image display control to play the image display function of above-mentioned display function layer, Also, touch detection control is carried out to provide touch drive signal to above-mentioned driving electrodes；Touch detection portion, in above-mentioned routine Under operator scheme, according to the detection signal from above-mentioned touch detection electrode, detection is approached or connect with above-mentioned touch detection electrode The position of tactile object；Touch detection control unit, in above-mentioned sleep pattern, above-mentioned object is detected to above-mentioned touch detection electrode Near to or in contact with, under above-mentioned sleep pattern, above-mentioned touch detection control unit detect above-mentioned object proximity or contact it is above-mentioned In the case of touch detection electrode, then above-mentioned control device controls pixel electrodes in regulation current potential, is then touched above-mentioned Touch and be supplied to above-mentioned driving electrodes with drive signal.
The electronic equipment of the present invention possesses the above-mentioned display device with touch detection function, for example, equivalent to television equipment, Mobile terminal devices such as digital camera, personal computer, video camera or portable phone etc..
Invention effect
According to the display device and electronic equipment with touch detection function of the present invention, can suppress to produce in display picture Raw image retention.
Brief description of the drawings
Fig. 1 is the block diagram for the configuration example for representing the display device with touch detection function that embodiment 1 is related to.
Fig. 2 be in order to illustrate the general principle of mutual capacitance type touch detection mode and show finger not in contact with or do not approach State explanation figure.
Fig. 3 be show finger shown in Fig. 2 not in contact with or not close state equivalent circuit example explanation Figure.
Fig. 4 is to show the shape that finger touchs or proximates to illustrate the general principle of mutual capacitance type touch detection mode The explanation figure of state.
Fig. 5 is the explanation figure of the example for the equivalent circuit for showing the state that the finger shown in Fig. 4 touchs or proximates to.
Fig. 6 is the figure of one of the waveform for representing drive signal and touch detection signal.
Fig. 7 is show to be provided with the module for the display device with touch detection function that embodiment 1 is related to one Figure.
Fig. 8 be show to be provided with the module for the display device with touch detection function that embodiment 1 is related to other its The figure of his example.
Fig. 9 is the figure of one for showing booster circuit.
Figure 10 is the figure of one for showing booster circuit.
Figure 11 is the figure of one for showing charge pump.
Figure 12 shows the figure of one of charge pump.
Figure 13 is the section for the brief section constitution for representing the display device with touch detection function that embodiment 1 is related to Figure.
Figure 14 is one of the control device for representing the display device with touch detection function that embodiment 1 is related to Figure.
Figure 15 is the circuit diagram for the pixel arrangement for representing the display device with touch detection function that embodiment 1 is related to.
Figure 16 is for illustrating be provided with the module for the display device with touch detection function that embodiment 1 is related to In, the schematic diagram of the relation between source electrode driver and pixel signal line.
Figure 17 is motor and the touch detection for showing the display device with touch detection function that embodiment 1 is related to The stereogram of one configuration example of electrode.
Figure 18 is the action example for the touch detection for representing the display device with touch detection function that embodiment 1 is related to Schematic diagram.
Figure 19 is the action example for the touch detection for representing the display device with touch detection function that embodiment 1 is related to Schematic diagram.
Figure 20 is the action example for the touch detection for representing the display device with touch detection function that embodiment 1 is related to Schematic diagram.
Figure 21 is the block diagram for the drive signal generating unit for showing the driving electrodes driver that embodiment 1 is related to.
Figure 22 is the block diagram for showing the driving electrodes driver that embodiment 1 is related to.
Figure 23 is the block diagram for the drive division for showing the driving electrodes driver that embodiment 1 is related to.
Figure 24 is the block diagram of the configuration example for the selecting switch for showing the driving electrodes driver that embodiment 1 is related to.
Figure 25 be in order to illustrate the general principle of self-capacitance type touch detection, show finger not in contact with or not close state Explanation figure.
Figure 26 be in order to illustrate the general principle of self-capacitance type touch detection, show finger not in contact with or not close state Explanation figure.
Figure 27 is to illustrate the general principle of self-capacitance type touch detection, shows that finger contact or close state are said Bright figure.
Figure 28 is the explanation that finger contact or proximity state are shown to illustrate the general principle of self-capacitance type touch detection Figure.
Figure 29 is the explanation figure for representing to detect circuit.
Figure 30 is the explanation figure of the equivalent circuit for the detection circuit for representing Figure 29.
Figure 31 is the figure of one of the waveform for the detection circuit for representing Figure 29.
The figure of the action of (IF) during Figure 32 is the frame for schematically showing the display device with touch detection function.
Figure 33 is the timing diagram of the action of the display device with touch detection function.
Figure 34 is the timing diagram of the display action of the display device with touch detection function.
Figure 35 is the timing diagram of the touch detection action of the display device with touch detection function.
The timing diagram that Figure 36 is the memory write of the display device with touch detection function and memory is read.
Other timing diagrams that Figure 37 is the memory write of the display device with touch detection function and memory is read.
Figure 38 is the timing diagram of the touch detection action of the display device with touch detection function.
Figure 39 is the flow chart of the action under the sleep pattern for representing the display device with touch detection function.
Figure 40 is the explanation figure for the timing waveform example for representing the display device with touch detection function.
Figure 41 is display action and the touch detection action for the display device with touch detection function that comparative example is related to Timing diagram.
Figure 42 is to schematically show the display device with touch detection function to show that 4 speeds of scanning are touched The figure of action during detection scanning.
The size that Figure 43 schematically shows the part detection zone RT for making the display device with touch detection function is portion The figure of action during point viewing area RD half size.
Figure 44 is the two parts viewing area for the display device for schematically showing temporary transient storage tape touch detection function The figure of action during RD data.
Figure 45 is the figure of one of the touch detection action for schematically showing the display device with touch detection function.
Figure 46 is the figure of one of the touch detection action for schematically showing the display device with touch detection function.
Figure 47 is the figure of one of the touch detection action for schematically showing the display device with touch detection function.
Figure 48 is one of the touch detection apparatus for showing the display device with touch detection function that embodiment 2 is related to Figure.
Figure 49 is the figure for the test section for showing the display device with touch detection function that embodiment 2 is related to.
Figure 50 is the figure for the test section for showing the display device with touch detection function that embodiment 2 is related to.
Figure 51 is the figure for showing the display device with touch detection function that embodiment 3 is related to.
Figure 52 is one of the control device for showing the display device with touch detection function that embodiment 4 is related to Figure.
Figure 53 is the block diagram for the drive division for showing the driving electrodes driver that embodiment 4 is related to.
Figure 54 is the block diagram of the configuration example for the selecting switch for showing the driving electrodes driver that embodiment 4 is related to.
Figure 55 is the drive for the driving electrodes driver for showing the display device with touch detection function that embodiment 5 is related to The block diagram in dynamic portion.
Figure 56 is the choosing for the driving electrodes driver for showing the display device with touch detection function that embodiment 5 is related to Select the block diagram of the configuration example of switch.
Figure 57 is show the module for being mounted with the display device with touch detection function that embodiment 6 is related to one Figure.
Figure 58 is the timing diagram of the action for the display device with touch detection function that embodiment 6 is related to.
Figure 59 is section for the brief section constitution for representing the display equipment with touch detection function that variation is related to Face figure.
Figure 60 is show to be applicable the electronic equipment of the display device of the present embodiment with touch detection function one The figure of example.
Figure 61 is show to be applicable the electronic equipment of the display device of the present embodiment with touch detection function one The figure of example.
Figure 62 is show to be applicable the electronic equipment of the display device of the present embodiment with touch detection function one The figure of example.
Figure 63 is show to be applicable the electronic equipment of the display device of the present embodiment with touch detection function one The figure of example.
Figure 64 is show to be applicable the electronic equipment of the display device of the present embodiment with touch detection function one The figure of example.
Figure 65 is show to be applicable the electronic equipment of the display device of the present embodiment with touch detection function one The figure of example.
Figure 66 is show to be applicable the electronic equipment of the display device of the present embodiment with touch detection function one The figure of example.
Figure 67 is show to be applicable the electronic equipment of the display device of the present embodiment with touch detection function one The figure of example.
Figure 68 is show to be applicable the electronic equipment of the display device of the present embodiment with touch detection function one The figure of example.
Figure 69 is show to be applicable the electronic equipment of the display device of the present embodiment with touch detection function one The figure of example.
Figure 70 is show to be applicable the electronic equipment of the display device of the present embodiment with touch detection function one The figure of example.
Figure 71 is show to be applicable the electronic equipment of the display device of the present embodiment with touch detection function one The figure of example.
Figure 72 is show to be applicable the electronic equipment of the display device of the present embodiment with touch detection function one The figure of example.
Embodiment
The mode (embodiment) for implementing the present invention is described in detail referring to the drawings.The present invention is not by following reality The content described in mode is applied to limit.Also, can be easy comprising those skilled in the art in the inscape of following record Key element, substantially the same key element expected.Also, the inscape recorded below can carry out appropriately combined.In addition, according to Following order illustrates.
1. embodiment (display device with touch detection function)
1-1. embodiments 1
1-2. embodiments 2
1-3. embodiments 3
1-4. embodiments 4
1-5. embodiments 5
1-6. embodiments 6
2. Application Example (electronic equipment)
The display device applications with touch detection function that above-mentioned embodiment is related to are in the example of electronic equipment.
3. the composition of the present invention
<1-1. embodiments 1>
[configuration example]
(all configuration examples)
Fig. 1 is the block diagram for the configuration example for representing the display device with touch detection function that embodiment 1 is related to.Band touches The display device 1 for touching detection function possesses：Display device 10, control unit 11 with touch detection function, gate drivers 12, source Driver 13, source selector portion 13S, driving electrodes driver 14, touch detection portion 40, touch detection control unit 100 with And gate drivers 100D.In the display device 1 with touch detection function, the display device 10 with touch detection function is It is built-in with the display device of touch detection function.Display device 10 with touch detection function is shown used for liquid crystal display element Show the so-called embedded device that the integration of touch detection device 30 of the liquid crystal display device 20 and capacitance type of element forms Part.In addition, the display device 10 with touch detection function can also be in the liquid for using liquid crystal display cells as display element The so-called external hanging type device of the touch detection device 30 of capacitance type is installed on LCD 20.
(feature)
There is display device 1 with touch detection function progress image to show and carry out the routine operation mould of touch detection Formula and shown without image and carry out the sleep pattern of touch detection.Display device 1 with touch detection function is in routine If not having touch operation in during certain under operator scheme, then it is changed into sleep pattern.Display dress with touch detection function If put 1 detects defined gesture in a sleep mode, it is changed into normal operating mode.
It is mainly control unit 11, gate drivers under normal operating mode, in the display device 1 with touch detection function 12nd, the work such as source electrode driver 13, source selector portion 13S, driving electrodes driver 14 and touch detection portion 40.Moreover, In normal operating mode, the application processor (host CPU, not of operating system program etc. and the whole electronic equipment of control is performed Diagram) and the backlight (not shown) of back side illuminaton light from the display device 1 with touch detection function etc. also work.Separately On the one hand, in a sleep mode, it is mainly control unit 11, source electrode driver 13, source in the display device 1 with touch detection function Pole selector portion 13S, driving electrodes driver 14, touch detection portion 40, touch detection control unit 100 and gate drivers 100D works.Moreover, in a sleep mode, application processor and backlight etc. do not work.In this way, electronic equipment can Reduce power consumption.
Under normal operating mode, the display device 1 with touch detection function is by driving electrodes COML described later with after Mutual capacitance mode between the touch detection electrode TDL stated detects touch operation.In a sleep mode, band touch detection function Display device 1 touch detection is detected the presence of by touch detection electrode TDL self-capacitance mode, if be tested with tactile Touch, then touch coordinate and gesture are detected by the mutual capacitance mode between driving electrodes COML and touch detection electrode TDL, if Defined gesture is detected, then is changed into normal operating mode.
Moreover, the display device 1 with touch detection function possess worked under normal operating mode gate drivers 12, And the gate drivers 100D to work in a sleep mode.(do not schemed by the mainboard of battery (not shown) or electronic equipment generally Show) etc. provide as defined in supply voltage (hereinafter referred to as Vcc) to the display device 1 with touch detection function.In normal operating mode Under, the display device 1 with touch detection function is in order that the liquid crystal display cells in liquid crystal display device 20 are run simultaneously at high speed Image is carried out at high speed to show, and it is (following by the supply voltage after power source voltage Vcc is boosted in booster circuit described later Claim Vdd) gate drivers 12 is worked.That is, gate drivers 12 are the circuits to be worked under supply voltage Vdd. And on the other hand, in a sleep mode, the display device 1 with touch detection function stops booster circuit to reduce power consumption, And gate drivers 100D is set to work under power source voltage Vcc.That is, gate drivers 100D is in power source voltage Vcc The circuit of lower work.
(general introduction of each several part)
Display device 10 with touch detection function is the display device for being built-in with touch detection function.Band touch detection work( The display device 10 of energy has liquid crystal display device 20 and touch detection device 30.As described later, liquid crystal display device 20 is The scanning signal Vscan provided according to gate drivers 12, the device shown to scanning a horizontal line one by one successively.This When, each part viewing area RD of the liquid crystal display device 20 after display picture to be vertically divided into 10 deciles, according to The secondary horizontal line that scans one by one is shown.Touch detection device 30 is according to the basic of capacitance type touch detection described later Principle works, output touch detection signal Vdet device.As described later, the touch detection device 30 drives according to by driving electrodes The drive signal VcomAC that dynamic device 14 provides is scanned successively, and carries out touch detection.
Control unit 11 is the circuit being controlled as follows：Based on the signal of video signal Vdisp provided by outside, difference Control signal is provided to gate drivers 12, source electrode driver 13, driving electrodes driver 14 and touch detection portion 40, is made These parts, which are mutually in step, to be acted.Control device in the present invention includes control unit 11, gate drivers 12, source drive Device 13, driving electrodes driver 14.
Control unit 11 has the memory 11a of temporarily storage signal of video signal Vdisp image information.In this embodiment, store Device 11a memory capacity corresponds to 1/10 data volume of the image information of 1 frame part.That is, for example, when the display point of vertical direction When resolution is 1280 pixel, memory 11a stores the image information of 128 line parts.
The image information for the signal of video signal Vdisp that memory 11a makes to be provided by host device is in the same manner as by host device The vertical synchronizing signal Vsnyc and horizontal-drive signal Hsync of offer are synchronous, and are written into.Then, memory 11a and band The internal clocking of the display device 1 of touch detection function is synchronous, and the image of storage is read by the speed faster than writing speed Information.Specifically, 1/10 data that memory 11a writes in the image information of 1 frame part a horizontal line one by one in order, Then, similarly, by next 1/10 data, cover 1/10 data above a horizontal line one by one in order and write Enter.Then, memory 11a before eliminating, is pressed suitable in the data write by capped with the speed faster than writing speed Sequence reads the data horizontal line one by one.Then, as described later, the display device 1 with touch detection function is along Vertical Square To display picture to be divided into each part viewing area RD after 10 deciles, the display of the data based on the reading is carried out.
Gate drivers 12 have according to the control signal provided by control unit 11, are selected to band touch detection work(successively One horizontal function of the object of the display driving of the display device 10 of energy.Specifically, as described later, gate drivers 12 By applying scanning signal Vscan to pixel Pix TFT elements Tr grid via scan signal line GCL, select successively in band A line (horizontal line) that the liquid crystal display device 20 of the display device 10 of touch detection function is formed in rectangular pixel Pix It is used as the object of display driving.
Source electrode driver 13 is according to the control signal provided by control unit 11, and picture element signal Vpix is supplied into band and touched The circuit of each pixel Pix (secondary pixel SPix) described later of the display device 10 of detection function.As described later, source electrode driver 13 Based on the signal of video signal Vdisp of a horizontal line part, generate multiple secondary pixel SPix of liquid crystal display device 20 picture element signal Vpix carries out picture element signal obtained by time division multiple, and supplies to source selector portion 13S.In addition, source electrode driver 13 generates For the switch controlling signal Vsel required for the picture element signal Vpix of separating image signals Vsig multiplexings, and believe with pixel Number Vpix supplies to source selector portion 13S together.In addition, source selector portion 13S can reduce source electrode driver 13 and control Cloth line number between portion 11 processed.
Driving electrodes driver 14 is according to the control signal supplied by control unit 11, to the display with touch detection function The drive signal of the driving electrodes COML described later supply touch detections of device 10 (with drive signal, hereinafter referred to as drive by touch Dynamic signal.) circuits of the VcomAC as the display driving voltage VcomDC of the voltage of display.Specifically, as described later, The Pd during display of driving electrodes driver 14 applies display driving voltage VcomDC to driving electrodes COML.Moreover, as after Described, the driving electrodes COML of objects of the Pt to being operated as touch detection during touch detection of driving electrodes driver 14 is applied Add drive signal VcomAC, display driving voltage VcomDC is applied to other driving electrodes COML.At this moment, driving electrodes drive Device 14 is according to each block (part detection zone RT described later) being made up of the driving electrodes COML of defined amount to driving electrodes COML is driven.Moreover, as described later, driving electrodes driver 14 is configured to make drive signal VcomAC frequency to send out Changing.
The circuit that touch detection portion 40 is discussed further below：Touched based on the control signal supplied from control unit 11 and from band The touch detection signal Vdet that the touch detection device 30 of the display device 10 of detection function supplies, is detected the presence of to touch detection The touch (above-mentioned contact condition) of device 30, in the case where there is touch, try to achieve its coordinate in touch detection region etc..Should Touch detection portion 40 possess touch detection signal amplifying part 42, A/D converter sections 43, signal processing part 44, coordinate extraction unit 45, with And detection timing (timing) control unit 46.
The touch detection signal Vdet that touch detection signal amplifying part 42 is supplied to touch detection device 30 is amplified. Touch detection signal amplifying part 42 can possess low-pass analog filter, and the low-pass analog filter removes touch detection signal The radio-frequency component (noise contribution) included in Vdet, extract and touch composition and exported respectively.
Touch detection control unit 100 acts in a sleep mode, first, is detected the presence of by self-capacitance mode and band is touched The touch (above-mentioned contact condition) of the touch detection apparatus 30 of the display device 10 of detection function.Then, touch detection controls Portion 100 is once tested with touch, just drives the gate drivers 100D of control unit 11, and is detected by mutual capacitance mode tactile Touch coordinate or gesture.Gate drivers 100D has according to the control signal provided by control unit 11, is selected to band successively and touches Touch a horizontal function of the driven object of the display device 10 of detection function.Touch detection control unit 100 touches according to by band The touch detection signal Vdet that the touch detection device 30 of the display device 10 of detection function supplies is touched, detects touch detection device The touch coordinate in 30 touch detection region and gesture etc..Then, touch detection control unit 100 once detects defined hand Gesture, the display device 1 with touch detection function is just set to be changed into normal operating mode.
(general principle of capacitance type touch detection)
General principle of the touch detection device 30 based on mutual capacitance type touch detection is acted, and exports touch detection letter Number Vdet.1~Fig. 6 of reference picture, inspection is touched to the mutual capacitance type in the display device 1 with touch detection function of present embodiment The general principle of survey illustrates.Fig. 2 is to represent finger not to illustrate the general principle of mutual capacitance type touch detection mode Contact or the explanation figure of not close state.Fig. 3 be show finger shown in Fig. 2 not in contact with or not close state The explanation figure of the example of equivalent circuit.Fig. 4 is to represent finger to illustrate the general principle of mutual capacitance type touch detection mode The explanation figure of the state touched or proximated to.Fig. 5 is the equivalent electric for showing the state that the finger shown in Fig. 4 touchs or proximates to The explanation figure of the example on road.Fig. 6 is the figure of an example of the waveform for showing drive signal and touch detection signal.
For example, as shown in Fig. 2 capacity cell C1 possesses a pair of electrodes for clipping dielectric D and being mutually oppositely disposed, driving electricity Pole E1 and touch detection electrode E2.As shown in figure 3, capacity cell C1 its one ends are connected to alternating message source (source driving signal) S, the other end are connected with voltage detector (touch detection portion) DET.Voltage detector DET is, for example, the touch detection shown in Fig. 1 The integrating circuit that signal amplifying part 42 is included.
If frequency as defined in applying from alternating message source S to driving electrodes E1 (capacity cell C1 one end) (such as count KHz~hundreds of kHz or so) ac square wave Sg, then by with touch detection electrode E2 (the capacity cell C1 other end) side The voltage detector DET of connection, show output waveform (touch detection signal Vdet).In addition, ac square wave Sg equivalent to Drive signal VcomAC described later.
In finger not in contact with the state (contactless state) of (or not approaching) device, as shown in FIG. 2 and 3, companion With the discharge and recharge to capacity cell C1, corresponding to the electric current I of capacity cell C1 capacitance0Flowing.Voltage detecting shown in Fig. 5 Device DET is by the electric current I corresponding to ac square wave Sg0Variation be converted to variation (the waveform V of solid line of voltage0)。
On the other hand, in the case where finger contacts (or close) state of device (contact condition), as shown in figure 4, being based on hand Refer to formed electrostatic capacitance C2 contact with touch detection electrode E2 or positioned adjacent, so as to be located at driving electrodes E1 and tactile Touch that the electrostatic capacitance of the marginal portion between detecting electrode E2 is shielded, as capacitance of the capacitance less than capacity cell C1 Capacity cell C1 ' and play a role.Also, when with the equivalent circuit shown in Fig. 5 to be observed, in capacity cell C1 ' Electric current I1Flowing.As shown in fig. 6, voltage detector DET is by the electric current I corresponding to ac square wave Sg1Variation be converted to voltage Variation (the waveform V of dotted line1).In this case, waveform V1With above-mentioned waveform V0Compare, amplitude diminishes.Thus, waveform V0With waveform V1Voltage differential absolute value | Δ V | changed according to the influence of the object accessible from the outside such as finger.This Outside, because voltage detector DET can accurately detection waveform V0With the absolute value of waveform V1 voltage differential | Δ V |, therefore More preferably through the switch in circuit, according to ac square wave Sg frequency, it has been configured for the charge and discharge to capacitor Reset operation during electricity is recovered.
Touch detection device 30 shown in Fig. 1 is (aftermentioned according to the drive signal Vcom supplied by driving electrodes driver 14 Drive signal VcomAC), successively one by one scan a detection block, carry out touch detection.
Touch detection device 30 is by the voltage detector DET shown in Fig. 3 or Fig. 5, from multiple aftermentioned touch detection electrodes TDL corresponds to each detection block output touch detection signal Vdet, and supplies to the A/D converter sections 43 in touch detection portion 40.
A/D converter sections 43 are with the timing synchronous with drive signal VcomAC, respectively to from touch detection signal amplifying part The analog signal of 42 outputs is sampled, and is converted to the circuit of data signal.
Signal processing part 44 possesses digital filter, and the digital filter is used for the output signal for reducing A/D converter sections 43 Included in, frequency content (noise contribution) outside the frequency sampled to drive signal VcomAC.Signal transacting Portion 44 is the logic circuit that the output signal based on A/D converter sections 43 detects the presence of the touch to touch detection device 30.Signal Processing unit 44 is only extracted the processing of the signal of the difference based on finger.The difference based on finger is above-mentioned waveform V0With Waveform V1Difference absolute value | Δ V |.Signal processing part 44 can enter to exercise the absolute value in a detection block | Δ V | it is average The computing of change, and try to achieve absolute value | Δ V | average value.Thus, signal processing part 44 can reduce the influence of noise.At signal Reason portion 44 by the signal of the difference based on finger detected compared with defined threshold voltage, if less than the threshold value electricity Pressure, then be judged as it is outside close to object be non-contact condition.On the other hand, signal processing part 44 by the digital voltage detected with Defined threshold voltage is compared, if more than threshold voltage, be judged as it is outside close to object be contact condition.By This, touch detection portion 40 can carry out touch detection.
Coordinate extraction unit 45 tries to achieve the logic electricity of its touch panel coordinate when being and detecting touch in signal processing part 44 Road.Timing control part 46 is detected in a manner of A/D converter sections 43, signal processing part 44 and coordinate extraction unit 45 are synchronously acted It is controlled.Coordinate extraction unit 45 is exported touch panel coordinate as signal output Vout.
(module)
Fig. 7 is one of the module for showing to be mounted with the display device with touch detection function involved by embodiment 1 The figure of example.As shown in fig. 7, the display device 1 with touch detection function have pixel substrate 2 (TFT substrate 21) described later and Flexible printed board T.Pixel substrate 2 (TFT substrate 21) is mounted with COG (Chip On Glass：Glass flip chip) 19, and formed There are the viewing area Ad and edge Gd of above-mentioned liquid crystal display part.COG19 is mounted to the chip of the IC drivers of TFT substrate 21, It is the control device of each circuit necessary to being built-in with the display actions such as the control unit 11 shown in Fig. 1, source electrode driver 13. In present embodiment, above-mentioned source electrode driver 13 and source selector portion 13S are formed in TFT substrate 21.Source drive Device 13 and source selector portion 13S can be built in COG19.In addition, the part as driving electrodes driver 14 Driving electrodes scanner section 14A, 14B are formed in TFT substrate 21.In addition, gate drivers 12 are as gate drivers 12A, 12B And formed in TFT substrate 21.In addition, gate drivers 100D is formed in TFT substrate 21.In addition, with touch detection function Display device 1 can in COG19 built-in driving electrodes scanner section 14A, 14B, gate drivers 12, gate drivers 100D Deng circuit.
As shown in fig. 7, on the direction vertical with the surface of TFT substrate 21, driving electrodes COML driving electrodes block B and Touch detection electrode TDL is formed in a manner of crossings on different level.
In addition, driving electrodes COML is divided into the electrode pattern of the multiple striateds extended in one direction.Entering When row touch detection acts, drive signal VcomAC is supplied successively from driving electrodes driver 14 to each electrode pattern.Quilt simultaneously The electrode pattern of supply drive signal VcomAC, driving electrodes COML multiple striateds is the driving electrodes block shown in Fig. 7 B.Driving electrodes block B (driving electrodes COML) is formed along the long side direction of the display device 10 with touch detection function, described later Touch detection electrode TDL is formed along the short side direction of the display device 10 with touch detection function.Touch detection electrode TDL's is defeated Go out the short brink that end is arranged at the display device 10 with touch detection function, by flexible printed board T and be installed on flexible print Brush substrate T touch IC110 connections.Touching IC110 includes touch detection portion 40 and touch detection control unit 100.So, touch IC110 is installed on flexible printed board T, and is connected respectively with the multiple touch detection electrode TDL being set up in parallel.Flexible printing As long as substrate T terminals, are not limited to flexible printed board, in this case, possesses touch in module-external IC110。
Drive signal generating unit described later is built in COG19.Displays of the source selector portion 13S in TFT substrate 21 Formed near the Ad of region using TFT elements.In the Ad of viewing area, multiple aftermentioned pixels are configured with rectangular (ranks shape) Pix.Edge Gd, Gd are not configured with pixel Pix region when being the surface of TFT substrate 21 from vertical direction.Raster data model In device 12, gate drivers 110D and driving electrodes driver 14 driving electrodes scanner section 14A, 14B configuration edge Gd, On Gd.
Gate drivers 12 possess gate drivers 12A, 12B, are formed on the tft substrate using TFT elements.Grid drives Dynamic device 12A, 12B can be in a manner of clipping secondary pixel SPix (pixel) described later and be configured to rectangular viewing area Ad from two Side is driven.In the following description, using gate drivers 12A as first grid driver 12A, by gate drivers 12B is as second grid driver 12B.In addition, scan line GCL described later is arranged in first grid driver 12A, second grid Between driver 12B.Therefore, scan line GCL described later is on the direction vertical with the surface of TFT substrate 21, with along with drive The mode of the parallel direction extension of moving electrode COML bearing of trend is set.
Gate drivers 100D is formed in TFT substrate 21 using TFT elements.Gate drivers 100D can drive from side Move the viewing area Ad that secondary pixel Spix (pixel) described later is configured with array-like.
Driving electrodes scanner section 14A, 14B are formed in TFT substrate 21 using TFT elements.Driving electrodes scanner section 14A, 14B receives display driving voltage VcomDC supply from drive signal generating unit by showing with wiring LDC, and by touching Touch the supply that drive signal VcomAC is received with wiring LAC.Driving electrodes scanner section 14A, 14B occupies certain width in edge Gd Spend Gdv.Also, driving electrodes scanner section 14A, 14B can drive each in the multiple driving electrodes block B being set up in parallel from both sides Individual driving electrodes block B.Display of the display with driving voltage VcomDC is supplied with wiring LDC and supplies touch drive signal VcomAC touch is configured at edge Gd, Gd side by side with wiring LAC.Display is configured at wiring LDC and connects up LAC more than touch Close to viewing area Ad sides.By the construction, viewing area is made by the display driving voltage VcomDC of display wiring LDC supplies The potential state of domain Ad end is stable.Therefore, especially in the liquid crystal display of liquid crystal of transverse electric field mode is employed, show Show stabilization.
The display device 1 with touch detection function as shown in Figure 7 is from the short of the display device 10 with touch detection function Avris exports above-mentioned touch detection signal Vdet.Thus, by being used as portion of terminal in the display device 1 with touch detection function Windings (draw I return) of the flexible printed board T with touching wiring when IC110 is connected becomes easy.
In addition, driving electrodes scanner section 14A, 14B can also be not formed on edge Gd, but it is built in COG19.Figure 8 be the figure for showing to be provided with the other examples of the module for the display device with touch detection function that embodiment 1 is related to.At this Example in, driving electrodes scanner section is built in COG19, and formed with from COG19 to driving electrodes block B (driving electrodes COML) supply Wiring to display with driving voltage VcomDC and drive signal VcomAC.
(booster circuit)
Below, illustrated to boosting and generating supply voltage Vdd booster circuit power source voltage Vcc.Fig. 9 and Figure 10 It is the figure of one for showing booster circuit.Fig. 9 is the figure for showing the booster circuit under sleep pattern, and Figure 10 is to show routine operation The figure of booster circuit under pattern.Booster circuit 70 is used as an example, is built in COG19, but can also be arranged on COG19 It is outside.
Booster circuit 70 possesses switch 71,72,75,76, charge pump 73,77 and adjuster 74,78.As shown in figure 9, In a sleep mode, switch 71 disconnects (オ Off), and switch 72 connects (オ Application).Thus, from battery or the main substrate of electronic equipment Supply voltage+Vcc (such as+3V to+5V or so) Deng supply is supplied to gate drivers 100D.In addition, in sleep pattern Under, switch 75 is disconnected, and switch 76 is connected.Thus, from the supply voltage-Vcc (examples of the supplies such as the main substrate of battery or electronic equipment Such as -3V to -5V or so) it is supplied to gate drivers 100D.
On the other hand, as shown in Figure 10, under normal operating mode, switch 71 is connected, and switch 72 disconnects.Thus, power supply Voltage+Vcc is supplied to charge pump 73, and charge pump 73 generates supply voltage+Vdd (such as+5V to+10V or so).Charge pump 73 is given birth to Into supply voltage+Vdd become stable by stabilizer 74, and be supplied to gate drivers 12A, 12B.Moreover, such as Figure 10 institutes Show, under normal operating mode, switch 75 is connected, and switch 76 disconnects.Thus, supply voltage-Vcc is supplied to charge pump 77, electricity Lotus pump 77 generates supply voltage-Vdd (such as -5V to -10V or so).Supply voltage-the Vdd that charge pump 77 generates passes through stabilization Device 78 becomes stable, and is supplied to gate drivers 12A, 12B.
Figure 11 and Figure 12 is the figure of one for showing charge pump.Charge pump 73 possesses switch S1~S3, and capacitor C11~ C12.In charge pump 73, first, switch S1 is connected, and capacitor C11 one end is connected to power source voltage Vcc.Moreover, capacitor The C11 other end is connected to earthing potential by switching S2.Thus, in capacitor C11, electric charge is electrically charged, voltage between terminals into For Vcc.In addition, switch S3 disconnects.
Next, switch S1 disconnects, moreover, the capacitor C11 other end is connected to power supply potential Vcc by switching S2. In addition, switch S3 is connected, capacitor C11 and power supply potential Vcc and capacitor C12 are connected in parallel.At this moment, capacitor C12 Voltage between terminals are as 2 × Vcc of aggregate value that power supply potential Vcc and capacitor C11 voltage between terminals are Vcc.Charge pump 73 By the way that switch S1~S3 is periodically turned on/off, power source voltage Vcc can be boosted.
Charge pump 73 is illustrated the above, and charge pump 77 and identical are formed.
(display device with touch detection function)
Below, the configuration example of the display device 10 with touch detection function is described in detail.Figure 13 is to show to implement The sectional view of the brief cross-sectional configuration of the display device with touch detection function involved by mode 1.Figure 14 is to show embodiment party The figure of one example of the control device of the display device with touch detection function involved by formula 1.Figure 15 is to show embodiment party The circuit diagram of the pixel arrangement of the display device with touch detection function involved by formula 1.
As shown in figure 13, the display device 10 with touch detection function include pixel substrate 2, with the pixel substrate 2 The opposing substrate 3 and insertion being oppositely disposed on the vertical direction in surface are arranged between pixel substrate 2 and opposing substrate 3 Liquid crystal layer 6.
Liquid crystal layer 6 passes through light therein according to the modulation of the state of electric field, and FFS (fringe field are used for example, using Switching, fringe field switch) pattern or IPS (in plane switching, in-plane switching) pattern etc. transverse electric field The liquid crystal display device of the liquid crystal of pattern.Also, can also in fig. 13 between shown liquid crystal layer 6 and pixel substrate 2 and Alignment films are respectively configured between liquid crystal layer 6 and opposing substrate 3.
In addition, opposing substrate 3 includes：Glass substrate 31, the colorized optical filtering being formed on a face of the glass substrate 31 Piece 32.The touch detection electrode formed with the detecting electrode as touch detection device 30 on another face of glass substrate 31 TDL, and it is configured with Polarizer 35 on touch detection electrode TDL.
Pixel substrate 2 includes：TFT substrate 21 as circuit substrate, with it is rectangular be disposed in it is more in the TFT substrate 21 Individual pixel electrode 22, form multiple driving electrodes COML between TFT substrate 21 and pixel electrode 22 and make pixel electric Pole 22 and the insulating barrier 24 of driving electrodes COML insulation.
(the system configuration example of display device)
Pixel substrate 2 possesses in TFT substrate 21：Viewing area Ad；Possesses the work(of interface (I/F) and timing generator The COG19 of energy；First grid driver 12A, second grid driver 12B, gate drivers 100D and source electrode driver 13. Flexible printed board T transmission shown in above-mentioned Fig. 7 is to the outer of the COG19 shown in Figure 14 for being configured as the COG19 shown in Fig. 7 Portion's signal or the driving electric power for driving COG19.Pixel substrate 2 is located at the TFT bases of transparent insulation substrate (such as glass substrate) The surface of plate 21, possesses：Viewing area Ad, the source electrode of multiple pixels including liquid crystal cells are configured with rectangular (ranks shape) Driver (horizontal drive circuit) 13, gate drivers (vertical drive circuit) 12A, 12B and 100D.Gate drivers (hang down Straight drive circuit) 12A, 12B as first grid driver 12A, second grid driver 12B to clip viewing area Ad side Formula and configure.
Viewing area Ad has matrix (ranks shape) construction that the secondary pixel SPix for including liquid crystal layer is configured to m rows × n row. In addition, in this manual, row refers to the pixel column of the n secondary pixel SPix with arrangement in one direction.In addition, row are Refer to the pixel column with m secondary pixel SPix being arranged on the direction orthogonal with being arranged with capable direction.Also, m and n value Determined according to the display resolution of vertical direction and the display resolution of horizontal direction.In the Ad of viewing area, to pixel Vpix m rows n row arrangement, according to every a line wiring have scan line GCLm+1, GCLm+2, GCLm+3 ..., according to each row Wiring has signal wire SGLn+1, SGLn+2, SGLn+3, SGLn+4, SGLn+5....Afterwards, in embodiments, mark sometimes For scan line GCL with represent scan line GCLm+1, GCLm+2, GCLm+3 ..., labeled as signal wire SGL with representation signal line SGLn+1、SGLn+2、SGLn+3、SGLn+4、SGLn+5...。
Input has the master clock as the external signal from outside, horizontal-drive signal and hung down on pixel substrate 2 Straight synchronizing signal, and provide to COG19.COG19 is by the master clock of the voltage amplitude of external power source, horizontal-drive signal and hangs down Straight sync signal level changes the voltage amplitude of (boosting) into the internal electric source needed for the driving of liquid crystal, as master clock, level Synchronizing signal and vertical synchronizing signal, vertical starting impulse VST, vertical clock pulse VCK, water are generated by timing generator Flat starting impulse HST and horizontal clock pulse HCK.COG19 is by vertical starting impulse VST, vertical clock pulse VCK supply the One gate drivers 12A, second grid driver 12B and gate drivers 100D, and by horizontal starting impulse HST and water Usually clock HCK supplies source electrode driver 13.COG19 generations are directed to each secondary pixel SPix pixel electrode, to each picture Element is commonly fed ground, is referred to as display driving voltage (comparative electrode current potential) VCOM of common potential, and supplies above-mentioned driving Electrode COML.
First grid driver 12A, second grid driver 12B and gate drivers 100D include shift LD described later Device, can also be including latch cicuit etc..By to first grid driver 12A, second grid driver 12B and gate drivers 100D supplies above-mentioned vertical starting impulse VST, so as to latch cicuit during a level in it is pair same with vertical clock pulse VCK The display data walked from COG19 outputs is sampled and latched successively.First grid driver 12A, second grid driver 12B It is with gate drivers 100D that the numerical data of a line part being latched in latch cicuit is defeated successively as vertical scanning pulse Go out, and supply scan line GCL, so as to select secondary pixel SPix successively with row unit.First grid driver 12A and second gate Driver 12B is configured in a manner of clipping scan line GCL on the bearing of trend in scan line GCL.Gate drivers 100D with Second grid driver 12B is adjacent to.First grid driver 12A, second grid driver 12B and gate drivers 100D Successively from viewing area Ad by the top, on vertical scanning direction from direction to viewing area Ad is entered on the lower, under vertical scanning Row output.
Source electrode driver 13 is supplied with the R (red), G (green), B (indigo plant) picture signal Vsig of such as 6 bits.Source electrode drives Each secondary picture for the row that dynamic device 13 is selected the vertical scanning based on first grid driver 12A and second grid driver 12B Plain SPix, according to each ground or according to per multiple pixels or according to all pixels together, pass through signal wire SGL Write display data.
Thin film transistor (TFT) (TFT, Thin formed with each secondary pixel SPix shown in Figure 14 and Figure 15 in TFT substrate 21 Film Transistor) element Tr, supply to each pixel electrode 22 shown in Figure 13 picture element signal Vpix pixel signal line The wirings such as SGL, the scan line GCL for driving each TFT elements Tr.In this way, pixel signal line SGL with TFT substrate 21 The parallel plane in surface on extend, the picture element signal Vpix for display image is supplied to pixel.Liquid crystal shown in Figure 15 Display device 20, which has, is arranged as rectangular multiple secondary pixel SPix.Secondary pixel SPix possesses TFT elements Tr and liquid crystal cell Part LC.TFT elements Tr is made up of thin film transistor (TFT), is MOS (the Metal Oxide by n-channel in this example embodiment Semiconductor：Metal-oxide semiconductor (MOS)) type TFT form.TFT elements Tr source electrode connects with pixel signal line SGL Connect, grid is connected with scan line GCL, and drain electrode is connected with liquid crystal cell LC one end.Liquid crystal cell LC one end and TFT elements Tr Drain electrode connection, the other end is connected with driving electrodes COML.
First grid driver 12A, second grid driver 12B and gate drivers 100D shown in Figure 14 pass through Figure 15 Shown scan line GCL puts on vertical scanning pulse secondary pixel SPix TFT elements Tr grid, so as to select successively Be formed as object of a line (horizontal line) as driving in rectangular secondary pixel SPix in the Ad of viewing area.Source drive Picture element signal Vpix is respectively fed to include by first grid driver 12A, second grid by device 13 by pixel signal line SGL Horizontal each secondary pixel SPix that driver 12B and gate drivers 100D are selected successively.Also, in these secondary pixels In SPix, a horizontal display is carried out according to the picture element signal supplied.Driving electrodes driver 14 applies display Drive signal (driving voltage VcomDC is used in display), and driving electrodes COML is driven.
As described above, the display device 1 with touch detection function with first grid driver 12A, second grid by being driven Dynamic device 12B and gate drivers 100D scans scan line GCLm+1, GCLm+2, GCLm+3 mode to be driven successively, according to One horizontal line of secondary selection.In addition, the display device 1 with touch detection function passes through to belonging to a horizontal secondary pixel SPix Source electrode driver 13 supplies picture element signal and shows a horizontal line one by one.When carrying out the display action, driving electrodes driver Driving electrodes COML corresponding to 14 pairs of horizontal lines applies drive signal Vcom.
Colored filter 32 shown in Figure 13 will for example be coloured to red (R), green (G), the colored filter of blue (B) this three color Colour gamut be periodically arranged, make in each secondary pixel SPix shown in above-mentioned Figure 15 this three color of R, G, B colour gamut 32R, 32G, 32B (reference picture 15) is corresponding with pixel Pix as one group.Colored filter 32 is on the direction vertical with TFT substrate 21 It is relative with liquid crystal layer 6.Also, as long as colored filter 32 is coloured to different colors or the combination of other colors.
Secondary pixel SPix shown in Figure 15 passes through scan line GCL and other pairs mutually gone together for belonging to liquid crystal display device 20 Pixel SPix is connected to each other.Scan line GCL is connected with gate drivers 12 and 100D, is swept by gate drivers 12 and 100D supplies Retouch signal Vscan.In addition, secondary pixel SPix passes through its of pixel signal line SGL and the same column for belonging to liquid crystal display device 20 His secondary pixel SPix is connected to each other.Pixel signal line SGL is connected with source electrode driver 13, and pixel letter is provided by source electrode driver 13 Number Vpix.
Figure 16 is illustrated in the module for being mounted with the display device with touch detection function involved by embodiment 1, The ideograph of the relation of source electrode driver and pixel signal line.As shown in figure 16, in the display device 1 with touch detection function In, pixel signal line SGL is connected by source selector portion 13S with source electrode driver 13 built-in in above-mentioned COG19.Source electrode Selector portion 13S carries out switch motion according to switch controlling signal Vsel.
As shown in figure 16, source electrode driver 13 is based on the picture element signal Vsig and source electrode driver supplied from control unit 11 Control signal, generate simultaneously output pixel signal Vpix.Picture signal Vsig of the source electrode driver 13 based on a horizontal line part, generation By multiple (being in this example three) secondary pixel SPix of the liquid crystal display device 20 of the display device 10 with touch detection function Picture element signal Vpix time division multiples obtained from picture signal, and supply to source selector portion 13S.In addition, source drive Device 13 generates the switch controlling signal Vsel being multiplexed into for separation required for picture signal Vsig picture element signal Vpix (VselR, VselG, VselB), and supplied together to source selector portion 13S with picture element signal Vsig.In addition, pass through the multichannel Multiplexing, the cloth line number between source electrode driver 13 and source selector portion 13S are reduced.
The picture signal Vsig and switch controlling signal that source selector portion 13S is supplied based on source electrode driver 13 Vsel, time division multiple is separated into picture signal Vsig picture element signal Vpix, and supply to the display with touch detection function The liquid crystal display device 20 of part 10.
Source selector portion 13S for example possess three switch SWR, SWG, SWB, three switch SWR, SWG, SWB each one End is connected to each other, and picture signal Vsig is fed with from source electrode driver 13.Three switches SWR, SWG, SWB each other end pass through The pixel signal line SGL of the liquid crystal display device 20 of display device 10 with touch detection function, connect respectively with secondary pixel SPix Connect.Three switch SWR, SWG, SWB supplied based on source electrode driver 13 switch controlling signal Vsel (VselR, VselG, VselB) switch is carried out respectively to control.According to this composition, source selector portion 13S can according to switch controlling signal Vsel, Switch SWR, SWG, SWB timesharing is switched successively, becomes connection (ON) state.Thus, source selector portion 13S is from more The picture signal Vsig separation picture element signal Vpix (VpixR, VpixG, VpixB) of road multiplexing.Also, source selector portion 13S Picture element signal Vpix is respectively fed to three secondary pixel SPix.It is colored as above-mentioned red (R), green (G), blue (B) this three color Colour gamut 32R, 32G, 32B it is corresponding with secondary pixel SPix foundation respectively.Therefore, supplied on secondary pixel SPix corresponding with colour gamut 32R To there is picture element signal VpixR.Picture element signal VpixG is fed with secondary pixel SPix corresponding with colour gamut 32G.With 32B pairs of colour gamut Picture element signal VpixB is fed with the secondary pixel SPix answered.
Secondary pixel SPix passes through driving electrodes COML and other the secondary pixels mutually gone together for belonging to liquid crystal display device 20 SPix is connected to each other.Driving electrodes COML is connected with driving electrodes driver 14, and supplies display by driving electrodes driver 14 With driving voltage VcomDC.I.e., in this example embodiment, belong to the multiple secondary pixel SPix mutually to go together and share driving electrodes COML.
Gate drivers 12 and 100D shown in Fig. 1 by through scan line GCL as shown in Figure 15 by scanning signal Vscan Secondary pixel SPix TFT elements Tr grid is put on, so as to select to be formed as rectangular in liquid crystal display device 20 successively Secondary pixel SPix in a line (horizontal line) be used as the object of driving.Source electrode driver 13 shown in Fig. 1 passes through Figure 15 Picture element signal Vpix is respectively fed to form the level selected successively by gate drivers 12 by shown pixel signal line SGL Each secondary pixel SPix of line.Also, in these secondary pixel SPix, it is horizontal that one is carried out according to the picture element signal Vpix supplied The display of line.Driving electrodes driver 14 shown in Fig. 1 applies drive signal Vcom to driving electrodes COML, and according to each Shown in Fig. 7 and Figure 15 including regulation bar number driving electrodes COML driving electrodes block B drives driving electrodes COML.
As described above, liquid crystal display device 20 scans scan line GCL's with gate drivers 12 and 100D timesharing successively Mode is driven, so as to select a horizontal line successively.In addition, liquid crystal display device 20 by source electrode driver 13 to belonging to One horizontal secondary pixel SPix supplies picture element signal Vpix, so as to carry out a horizontal display one by one.Carrying out the display During action, driving electrodes driver 14 applies aobvious to the driving electrodes block including the driving electrodes COML corresponding to a horizontal line Show and use driving voltage VcomDC.
Driving electrodes COML involved by present embodiment plays function as the driving electrodes of liquid crystal display device 20, and And the driving electrodes also as touch detection device 30 play function.Figure 17 is to show that the band involved by embodiment 1 touches inspection The stereogram of the driving electrodes of the display device of brake and a configuration example of touch detection electrode.As shown in figure 13, scheme Driving electrodes COML shown in 17 is relative with pixel electrode 22 on the direction on the surface of TFT substrate 21.Touch detection Device 30 is made up of the driving electrodes COML for being arranged at pixel substrate 2 and the touch detection electrode TDL for being arranged at opposing substrate 3. Touch detection electrode TDL is by the striated that is upwardly extended in the side that the bearing of trend of the electrode pattern with driving electrodes COML intersects Electrode pattern form.Also, touch detection electrode TDL on the direction vertical with the surface of TFT substrate 21 with driving electrodes COML is relative.Touch detection electrode TDL each electrode pattern touch detection signal amplifying part 42 with touch detection portion 40 respectively And the input connection of touch detection control unit 100.By driving electrodes COML and touch detection electrode TDL electrode intersected with each other Pattern makes its cross section produce electrostatic capacitance.In addition, touch detection electrode TDL or driving electrodes COML (driving electrodes block) are simultaneously It is not limited to be divided into the shape of a plurality of striated.Such as touch detection electrode TDL or driving electrodes COML (driving electrodes Block) can also be comb-like form.Or touch detection electrode TDL or driving electrodes COML (driving electrodes block) be divided into it is multiple , the shape of division driving electrode COML otch can be that straight line can also be curve.
According to this composition, in touch detection device 30, when carrying out touch detection action, driving electrodes driver 14 with point When ground wire sequential scan Fig. 7 shown in driving electrodes block B mode be driven.Thus, on the Scan of scanning direction successively Select driving electrodes COML driving electrodes block B (detection block).Also, touch detection device 30 is from touch detection electrode TDL output touch detection signals Vdet.In this way, touch detection device 30 carries out the touch detection of a detection block.
Figure 18, Figure 19 and Figure 20 are shown in the display device with touch detection function involved by embodiment 1 The ideograph of the action example of touch detection.Figure 18~Figure 20 show to touch detection face by 10 part detection zone RT1~ In the case of RT10 compositions, each several part detection zone RT1~RT10 supply drive signals VcomAC supply action.Examine part Survey the width (such as 5mm or so) that region RT is for example set to correspond to the finger size of operation user.Driving electrodes drive Device 14 applies drive signal VcomAC in each part detection zone RT to driving electrodes COML.Oblique line portion shows to be supplied to drive Dynamic signal VcomAC part detection zone RT, display are supplied to other part detection zones with driving voltage VcomDC RT.Driving electrodes driver 14 shown in Fig. 1 is selected to the part detection zone of the object of the touch detection action shown in Figure 18 Part detection zone RT3 in the RT of domain, and apply touch drive signal VcomAC.Next, driving electrodes driver 14 selects The part detection zone RT4 in the part detection zone RT shown in Figure 19 is selected, and applies touch drive signal VcomAC.Connect , driving electrodes driver 14 selects the part detection zone RT5 in the part detection zone RT shown in Figure 20, and applies touch With drive signal VcomAC.In this way, the selected section detection zone RT, and by belonging to the portion successively of driving electrodes driver 14 Divide the driving electrodes COML of detection zone to apply touch drive signal VcomAC, and all part detection zone RT are carried out Scanning.In addition, in this example embodiment, for convenience of description, part detection zone RT number is assumed to 10, but do not limit to In this.Moreover, a part detection zone RT can include a driving electrodes block B, a part detection zone RT can also Including multiple driving electrodes block B.
Belong in touch detection device 30 the driving electrodes block B of the part detection zone RT shown in Figure 18 to Figure 20 with it is above-mentioned Capacitance type touch detection general principle in driving electrodes E1 it is corresponding.A touch detection in touch detection device 30 Electrode TDL is corresponding with touch detection electrode E2.Touch detection device 30 detects according to above-mentioned general principle to touch.And And as shown in figure 17, the electrode pattern of crossings on different level makes electrostatic capacity type touch sensor be configured to rectangular each other.Therefore, Integrally it is scanned by the touch detection face to touch detection device 30, can detects and generate the outside contact close to object Or close proximity.
(drive signal generating unit and driving electrodes driver)
Figure 21 is the block diagram for the drive signal generating unit for showing the driving electrodes driver involved by embodiment 1.Driving Signal generation portion 14Q includes high level voltage generating unit 61, low level voltage generating unit 62, buffer 63,64,66, Yi Jikai Powered-down road 65.
High level voltage generating unit 61 generates touch drive signal VcomAC high level voltage.Low level voltage generates Portion 62 generates display driving voltage VcomDC DC voltage.The voltage that the low level voltage generating unit 62 is generated also serves as Touch and used with drive signal VcomAC low level voltage.The voltage one that buffer 63 supplies high level voltage generating unit 61 Side carries out impedance transformation while exporting, and supplies to on-off circuit 65.Buffer 64 will supply from low level voltage generating unit 62 Voltage carry out impedance transformation while exporting, and supply to on-off circuit 65.On-off circuit 65 is based on driving control signal EXVCOM, it is low level to be alternately repeated situation that driving control signal EXVCOM is high level and driving control signal EXVCOM Situation, generation touch drive signal VcomAC.On-off circuit 65 driving control signal EXVCOM be high level in the case of, The voltage supplied by buffer 63 is exported, in the case of driving control signal EXVCOM is low level, is exported by buffer 64 The voltage of supply.On-off circuit 65 is based on driving control signal EXVCOM, is low level feelings in driving control signal EXVCOM Under condition, using the direct voltage output by the voltage that buffer 64 supplies as display driving voltage VcomDC.Buffer 63,64 Such as it is made up of voltage follower.In addition, the voltage that on-off circuit 65 exports is exported to lead-out terminal 65E.Buffer 66 will The voltage supplied from low level voltage generating unit 62 carries out impedance transformation while exporting, by display driving voltage VcomDC DC voltage supply to lead-out terminal 66E.
Figure 22 is the block diagram for showing the driving electrodes driver involved by embodiment 1.Driving electrodes scanner section 14A, 14B Possess scan control section 51, touch detection scanner section 52 and drive division 530.Drive division 530 possesses identical with driving electrodes block B Drive division 53 (k)~53 (k+3) of quantity.Scan control section 51 is installed on COG19.In addition, touch detection scanner section 52 and drive Dynamic portion 530 is configured in the edge Gd around the Ad of viewing area.Afterwards, when mentioning multiple drive division 53 (k)~53 (k+3) In any one when, refer both to only use drive division 53 a situation.
Scan control section 51 supplies control letter to touch detection scanner section 52 based on the control signal supplied from control unit 11 Number SDCK, scanning commencing signal SDST.In addition, display wiring LDC supplies are passed through from above-mentioned drive signal generating unit 14Q The display driving voltage VcomDC of lead-out terminal 66E outputs.Generated to touching with wiring LAC supplies from above-mentioned drive signal Portion 14Q passes through the touch that lead-out terminal 65E is exported drive signal VcomAC.Scan control section 51 will be generated by drive signal 14Q supply touches in portion are supplied to drive division 530 with drive signal VcomAC driving electrodes selection signal VCOMSEL.
Touch detection scanner section 52 is configured to include driving electrodes shift register 52SR, and generates for selecting to apply Touch scanning signal ST (k), ST (k+1), ST (k+2), the ST (k+3) ... of the driving electrodes COML with drive signal VcomAC. Specifically, in touch detection scanner section 52, letter the scanning that shift register 52SR will be supplied by scan control section 51 Number SDST makes it synchronous with control signal SDCK, entered successively according to each shift register 52SR delivery section as triggering Row transmission, and selected successively.Selected shift register 52SR by scanning signal ST (k), ST (k+1), ST (k+2), ST (k+3) ... is sent out to each logic integrated circuit 54 of drive division 530.Touch detection scanner section 52 is in selected shift register 52SR is for example using the signal of high level as+2 scanning signal ST (k+2) supplies of kth to+2 drive divisions of kth 53 (k+2) In the case of, the drive division 53 (k+2), which puts on drive signal VcomAC, belongs to the multiple of+2 driving electrodes block B (k+2) of kth Driving electrodes COML.After, when mentioning any one in scanning signal ST (k), ST (k+1), ST (k+2), ST (k+3) ..., Sometimes scanning signal ST is used.
The circuit that drive division 530 is discussed further below：Based on the scanning signal ST supplied from touch detection scanner section 52 and The driving electrodes selection signal VCOMSEL supplied from scan control section 51, the display supplied from drive signal generating unit 14Q is used Driving voltage VcomDC or touch put on driving electrodes COML with drive signal VcomAC.Drive division 53 corresponds to touch detection The output signal of scanner section 52 and set one by one, drive signal Vcom is applied to corresponding driving electrodes block B.
Drive division 53 possesses logic integrated circuit 54 and the selecting switch SW of corresponding each driving electrodes block B settings one (SW2、SW3、SW4).Logic integrated circuit 54 generates the scanning signal ST supplied by touch detection scanner section 52 and controlled by scanning The logic product (AND) for the driving electrodes selection signal VCOMSEL that portion 51 processed supplies, and exported.Logic integrated circuit 54 has It is enlarged into the pooling feature of the amplitude level for the action for being capable of control selections switch SW1 (SW2, SW3, SW4).Selecting switch SW1 The signal that logic-based product circuit 54 is supplied carrys out control action.Selecting switch SW1 one end includes more with driving electrodes block B Individual driving electrodes COML connections, selecting switch the SW1 other end and display with wiring LDC and are touched with one in wiring LAC Individual connection.
According to this composition, drive division 53 is high level in scanning signal ST and driving electrodes selection signal VCOMSEL is high In the case of level, touch is exported by the use of drive signal VcomAC as drive signal Vcom.Drive division 53 is in scanning signal ST In the case of being low level for low level or driving electrodes selection signal VCOMSEL, driving electrodes block B is set to be connected up from touch LAC is separated, and is connected with display with wiring LDC.Here, it is selected as the driving of touch drive signal VcomAC object output Electrode block B is selection driving electrodes block STX.It is not selected for the driving electrodes of touch drive signal VcomAC object output Block B is non-selection driving electrodes block NTX.For example, because the drive division 53 (k+2) shown in Figure 22 is to belonging to+2 driving electricity of kth Pole block B (k+2) multiple driving electrodes COML apply drive signal VcomAC, and therefore, it is driving electricity to select driving electrodes block STX Pole block B (k+2).Also, it is not selected for the driving electrodes block B (k) of touch drive signal VcomAC object output, B (k+ 1), B (k+3) is non-selection driving electrodes block NTX.
In addition, when liquid crystal display device 20 carries out display action, scanning signal ST is low level, and drive division 53 will be corresponding All it is connected, will be shown with display with wiring LDC in an each driving electrodes block B selecting switch SW1 (SW2, SW3, SW4) Exported by the use of driving voltage VcomDC as drive signal Vcom.
Figure 23 is the block diagram for the drive division for showing the driving electrodes driver involved by embodiment 1.Figure 24 is to show reality Apply the block diagram of the configuration example of the selecting switch of the driving electrodes driver involved by mode 1.Figure 23 and Figure 24 are to first grid The composition of driver 12A sides is illustrated, and second grid driver 12B composition is also same.In addition, the following description It is illustrated using selecting switch SW1 as representative, selecting switch SW2, SW3, SW4 are also same.First grid driver 12A Including gate shift register 120SR.Gate shift register 120SR is responded with vertical starting impulse VST and is started to act, with Vertical clock pulse VCK is synchronous, is selected successively on vertical scanning direction, is exported vertically selected pulse by buffer circuit Give scan line GCL.
Selecting switch SW1 possesses the multiple switch COMSW set corresponding to each driving electrodes COML.Switch COMSW According to switch controlling signal Ssw, Sxsw, acted corresponding to each driving electrodes COML.Switch COMSW by corresponding to Each driving electrodes COML is acted, by timesharing come select touchs wiring LAC and driving electrodes COML connection with And any one of display in wiring LDC and driving electrodes COML connection.
For example, switch COMSW is in the situation using cmos switch CMOS1 and cmos switch CMOS2 as a circuit unit Under, each driving electrodes COML is provided with multiple circuit units.Cmos switch CMOS1 and cmos switch CMOS2 bags Include：The transistor NMOS of grid with N-channel and the grid with P-channel transistor PMOS.
In cmos switch CMOS1, switch signal line GSW is connected with transistor NMOS, transistor PMOS grid. In cmos switch CMOS2, switch signal line GxSW is connected with transistor NMOS, transistor PMOS grid.Supply to switch is believed Number line GSW switch controlling signal Ssw and supply are to the height electricity that switch signal line GxSW switch controlling signal Sxsw is current potential The signal that gentle low level has mutually inverted.Therefore, cmos switch CMOS1, cmos switch CMOS2 can connect up with touch LAC and driving electrodes COML connection and display it is synchronous with any one in wiring LDC and driving electrodes COML connection and Carry out identical selection.So, selecting switch SW1 possesses multiple switch COMSW corresponding to each driving electrodes COML, switch COMSW is connected in parallel in touch between wiring LAC and driving electrodes COML.Multiple switch COMSW is according to alternatively signal Switch controlling signal Ssw, Sxsw, acted corresponding to each driving electrodes COML, so as to connect touch wiring LAC With driving electrodes COML, and apply touch drive signal VcomAC.
Logic integrated circuit 54 possesses phase inverter (inverter) 541, on-off circuit 542, buffer 543, phase inverter 544. When scanning signal ST is high level by phase inverter 541 in driving electrodes shift register 52SR selected delivery section output The inverted logic of signal exports to on-off circuit 542.On-off circuit 542 is according to driving electrodes selection signal VCOMSEL, based on anti- The input and output of phase device 541 are switched, and to the output switch control signal Ssw of buffer 543.Buffer 543 will be opened Control signal Ssw amplifications are closed, and are supplied to switch signal line GSW.Phase inverter 544 generates the switch control that buffer 543 exports Signal Ssw inverted logic, and as switch controlling signal Sxsw outputs, supply to switch signal line GxSW.
Cmos switch CMOS1, CMOS2 are connected by connecting conductor Q3 with touching with wiring LAC.In addition, cmos switch CMOS1, CMOS2 are connected by connecting conductor Q2 with display with wiring LDC.Cmos switch CMOS1, CMOS2 are by connecting conductor Q1 is connected with driving electrodes COML.Cmos switch CMOS1, CMOS2 can be by transistor NMOS, transistor PMOS grids Input switch control signal Ssw, Sxsw, and select connection conductor Q1 and connect conductor Q2 connection and connection conductor Q3 and company Connect any one connection in conductor Q1 connection.
As shown in figure 24, scan line GCL is routed in same layer with switch signal line GSW, GxSW.Scan line GCL is with opening The gate line of OFF signal line GSW, GxSW identical transistor, can shorten manufacturing process by being formed with same processes.Scanning Line GCL is via insulating barrier with touching with wiring LAC, display wiring LDC crossings on different level.Also, selecting switch SW1 configurations are in place Between touch connects up the scan line GCL of LAC (display wiring LDC) crossings on different level (such as scan line GCLm+1 with sweep Retouch between line GCLm+2) region.It is mutual with the scan line GCL of wiring LAC (display wiring LDC) crossings on different level with touching The interval scan line GCL mutual interval adjacent with the Ad of viewing area is identical.
(general principle of self-capacitance type touch detection)
General principle of the touch detection control unit 100 in a sleep mode based on self-capacitance type touch detection and act, examine Survey has no touch.25~Figure 31 of reference picture, the self-capacitance type of the display device 1 with touch detection function of present embodiment is touched The general principle for touching detection illustrates.Figure 25 and Figure 26 is to illustrate the general principle of self-capacitance type touch detection, show Finger not in contact with or not close state explanation figure.Figure 27 and Figure 28 is to illustrate the substantially former of self-capacitance type touch detection Reason, the explanation figure of finger contact or close state is shown.Figure 29 is the explanation figure for representing to detect circuit.Figure 30 is to represent Figure 29 Detection circuit equivalent circuit explanation figure.Figure 31 is the figure of one of the waveform for the detection circuit for representing Figure 29.
First, as shown in figure 25, touch detection electrode TDL is connected by switch 201 with power source voltage Vcc.Touch detection Electrode TDL has electrostatic capacitance C3, and direction of the electric charge along arrow 203 is flowed from power supply potential Vcc to touch detection electrode TDL Dynamic, touch detection electrode TDL is charged the electric charge corresponding to electrostatic capacitance C3.
Next, as shown in figure 26, touch detection electrode TDL is connected by switch 201 with detection circuit 202, is charged Direction flow detection circuit 202 of the touch detection electrode TDL electric charge along arrow 204.Circuit 202 is detected by measuring from tactile The electric charge of detecting electrode TDL inflows is touched, touch detection electrode TDL electrostatic capacitance C3 can be detected.
Next, opponent's abutment or the situation close to touch detection electrode TDL illustrate.As shown in figure 27, in hand Abutment or during close to touch detection electrode TDL, the electrostatic capacitance C2 of finger is applied in touch detection electrode TDL electrostatic electricity Hold on C3.Therefore, when touch detection electrode TDL is connected by switch 201 with power source voltage Vcc, electric charge is along arrow 203 Direction flows to touch detection electrode TDL from power supply potential Vcc, and the electric charge based on electrostatic capacitance C3 and C2 is charged touch detection electricity Pole TDL and finger.
Next, as shown in figure 28, touch detection electrode TDL is connected by switch 201 with detection circuit 202, is charged Direction flow detection circuit 202 of the electric charge of touch detection electrode TDL and finger along arrow 204.Detection circuit 202 passes through survey The electric charge flowed into from touch detection electrode TDL and finger is measured, the electrostatic capacitance of touch detection electrode TDL and finger can be detected.
Figure 29 is the explanation figure for representing to detect circuit.Hereinafter, electrostatic capacitance Cx of the reference picture 29 to touch detection electrode TDL Measuring sequence illustrate.
Step 1：First, ON switch 207, switch 206 and 208 is disconnected, by resistance Rc and capacitor Cc series circuit It is connected between power source voltage Vcc and earthing potential, electric charge is filled with to capacitor Cc.
Step 2：Next, switch 206~208 is all switched into disconnection.Maintain capacitor Cc electric charge.
Step 3：Switch 206 and 208 is remained up the regular hour, and make capacitor Cx and capacitor Cr tie point And capacitor Cr and resistance Rc tie point ground connection.While capacitor Cx and Cr electric charge are all discharged, capacitor Cc's A part of electric charge is discharged by resistance Rc.
Step 4：Next, switch 206~208 is all switched into disconnection.Capacitor Cc electric charge is moved to capacitor Cx and Cr.
Step 5：Using comparator 205 by capacitor Cx voltage between terminals Vx compared with reference voltage V ref.Such as Shown in Figure 30, the voltage between terminals Vc of capacitor Cc at this moment is capacitor Cr voltage between terminals Vr and capacitor Cx terminal Between voltage Vx sum.
Voltage Vc, Vr, Vx and electric capacity Cc, Cr, Cx relation, following formula can be expressed as：
Vc=Vr+Vx ... (1)
Vr: Vx=1/Cr: 1/Cx ... (2)
Vx=Cr/ (Cr+Cx) × Vc ... (3)
Implement above-mentioned steps 3~5 repeatedly, untill Vx ＜ Vref.As shown in above-mentioned formula (3), if finger contact or Close to touch detection electrode TDL, electric capacity Cx becomes big, then the discharge cycles number untill condition Vx ＜ Vref are met (repeats secondary Number) tail off.The touch of finger/non-tactile can be judged by discharge cycles number.
In Figure 31, period t20 be finger not in contact with or not close to during touch detection electrode TDL, period t21 is finger Contact or close to during touch detection electrode TDL.Moreover, in Figure 31, bar chart represents voltage Vx, and line chart represents voltage Vc。
With above-mentioned steps 3~5 are repeated, voltage Vc is reduced step by step.Voltage Vx is represented by above-mentioned formula (3).
If finger contact or close to touch detection electrode TDL and electric capacity Cx increase, the electric discharge untill Vx ＜ Vref Period (number of repetition) tails off.
Finger not in contact with or not close to touch detection electrode TDL in the case of, t31 to Vx ＜ Vref when since measurement Untill during t41 discharge cycles number (number of repetition) be 8 times.On the other hand, in finger contact or electric close to touch detection In the case of the TDL of pole, when since measurement untill t33 to Vx ＜ Vref during t42 discharge cycles number (number of repetition) be 6 It is secondary.
In this way, detection circuit 202 passes through the discharge cycles number (number of repetition) untill measuring Vx ＜ Vref, it is possible to determine that Whether finger contacts or close to touch detection electrode TDL.
Here, TFT substrate 21 is corresponding with a concrete example of " substrate " in the present invention.In pixel electrode 22 and the present invention " pixel electrode " a concrete example it is corresponding.Pixel signal line SGL and one of " pixel signal line " in the present invention are specific Example is corresponding.Driving electrodes COML is corresponding with a concrete example of " driving electrodes " in the present invention.Liquid crystal cell LC and the present invention In " display function layer " a concrete example it is corresponding.Gate drivers 12 and 100D, source electrode driver 13 and driving electrodes Driver 14 is corresponding with a concrete example of " control device " in the present invention.Touch detection electrode TDL and " touching in the present invention Touch detecting electrode " it is corresponding.One concrete example pair of touch detection control unit 100 and " touch detection control unit " in the present invention Should.(action and effect)
Then, the action to the display device 1 with touch detection function of embodiment 1 and effect illustrate. In the following description, the drive signal Vcom as the drive signal of display is recited as display driving voltage VcomDC, Drive signal Vcom as the drive signal of touch detection is recited as touch drive signal VcomAC.
(molar behavior summary)
First, reference picture 1, the molar behavior summary of the display device 1 with touch detection function is illustrated.Control unit 11 according to application processor (host CPU) supply signal of video signal Vdisp, respectively to gate drivers 12, source electrode driver 13, Driving electrodes driver 14 and touch detection portion 40 supply control signal, and in a manner of these signals act synchronously with one another It is controlled.Moreover, the memory 11a of control unit 11 make by application processor supply signal of video signal Vdisp in the same manner as by Write after the vertical synchronizing signal Vsync of application processor supply and horizontal-drive signal Hxync synchronizations, and make what is write After data are synchronous with the internal clocking of the display device 1 with touch detection function, read with speed more faster than writing speed.
Gate drivers 12 supply scanning signal Vscan to liquid crystal display device 20, and are selected to display driving successively Object a horizontal line.Source electrode driver 13 generates picture element signal Vsig, Yi Jiyu that picture element signal Vpix is multiplexed Its corresponding switch controlling signal Vsel, and supply to source selector portion 13S.Source selector portion 13S is according to picture element signal Vsig and switch controlling signal Vsel separation generation picture element signal Vpix, and picture element signal Vpix is supplied to the level of composition one Each pixel Pix of line.The Pd during display of driving electrodes driver 14 applies display driving electricity to whole driving electrodes COML Press VcomDC.Moreover, driving electrodes driver 14 during touch detection Pt to belonging to the object as touch detection action Part detection zone RT driving electrodes COML applies touch detection drive signal VcomAC, and to other driving electrodes COML applies display driving voltage VcomDC.It is dynamic that display device 10 with touch detection function Pd during display carries out display Make, and Pt carries out touch detection action during touch detection, and export touch detection signal from touch detection electrode TDL Vdet。
The touch in touch detection face is detected according to touch detection signal Vdel in touch detection portion 40.Specifically, inspection is touched Survey signal amplifying part 42 and remove the radio-frequency component (noise contribution) included in touch detection signal Vdet, extraction touch composition is simultaneously defeated Go out.The analog signal that touch detection signal amplifying part 42 exports is converted to data signal by A/D converter sections 43.Signal processing part 44 According to the output signal of A/D converter sections 43, the touch on touch detection face is detected the presence of.Touched in signal processing part 44 When touching detection, coordinate extraction unit 45 obtains the touch panel coordinate.Timing control part 46 is detected so that touch detection signal amplifies The mode that portion 42, A/D converter sections 43, signal processing part 44, coordinate extraction unit 45 synchronously act is controlled.
(action in detail)
Below, with reference to several accompanying drawings, the action to the display device 1 with touch detection function is described in detail.
The figure of action during Figure 32 is the frame for schematically showing the display device with touch detection function in (IF). In the Figure 32, transverse axis represents the time, and the longitudinal axis represents the position of the vertical direction of display picture.In addition, the Figure 32 eliminate it is vertical During straight blanking.
Figure 33 is the timing diagram of the action of the display device with touch detection function, and (A) represents vertical synchronizing signal Vsync Waveform, (B) represent that horizontal-drive signal Hsync waveform, (C) represent to show and believed by storing the image of write-in WM write-ins Part display driving RD, (D) of breath represent that the part display driving RD, (E) that turn into display driving DD object are represented to turn into and touched Touch the part detection zone RT of detection driving DT object.
In this embodiment, (IF) is interacted during being configured with 10 touch detections during Pt and 10 display during a frame Pd.Moreover, the Pt during touch detection of the display panel 10 with touch detection function carries out touch detection driving DT, and aobvious Show that period Pd carries out display driving DD.
Signal of video signal Vdisp, the vertical synchronizing signal Vsync and level that memory 11a provides according to application processor are same Signal Hsync is walked, a horizontal line is sequentially written in (storage write-in WM) one by one by 1/10 data in the image information of a frame part. Then, 1/10 data before memory 11a makes subsequent 1/10 data horizontal line order overrides one by one on one side are while write Enter.Moreover, memory 11a write-in data by capped and before eliminating, with speed more faster than the writing speed by Horizontal line order reads the data of the write-in one by one.In addition, the number of gate drivers 12 and source electrode driver 13 according to the reading According to being driven by the part viewing area RD of line sequential scan liquid crystal display device 20 (display driving DD).
As described above, in the display device with touch detection function, memory 11a is with speed more faster than the writing speed Degree reads write data a horizontal line one by one, and carries out display driving DD according to the reading data.That is, the display is carried out Pd time width becomes 1/10 data write than memory 11a in the image information of a frame part during driving DD display Time is shorter.In the display device with touch detection function, using by Pd during so shortening display time for ensuring (Pt during touch detection), touch detection driving DT is carried out according to each part detection zone RT.
As shown in figure 32, in this embodiment, touch detection driving DT selects 2 portions successively according to Pt during each touch detection Divide detection zone RT as driven object.That is, the touch detection in this on touch detection face is scanned to show the 2 of scanning times Sweep speed is carried out.That is, the display device with touch detection function is once being shown in the time of scanning, can carry out 2 Secondary touch detection scanning.So, the display device with touch detection function is by continually carrying out touch detection scanning, Ke Yili I.e. response external and can improve the response characteristic to touch close to the touch of object.
(action of normal operating mode)
Below, to the action of the normal operating mode of the display device 1 with touch detection function, that is, Pd's is aobvious during showing Show that the touch detection action of Pt during action and touch detection illustrates.
Figure 34 is the timing diagram of the display action of the display device with touch detection function, and (A) represents scanning signal Vscan Waveform, (B) represents picture signal Vsig waveform, and (C) represents switch controlling signal Vsel waveform, and (D) represents pixel letter Number Vpix waveform, (E) represent drive signal Vcom waveform.
Display device 1 with touch detection function during display Pd by driving electrodes driver 14 to all drivings Electrode COML applies display and is directed to driving voltage VcomDC (Figure 34 (E)), gate drivers 12 during each level (1H) Apply scanning signal Vscan successively to scan line GCL to carry out display scanning.Hereinafter, it is described in detail.
During one level (1H) timing t 1 beginning after, gate drivers 12 display action is related in timing t 2 n-th Horizontal scanning line GCL (n) applies scanning signal Vscan, scanning signal Vscan (n) and is changed to high level (Figure 34 by low level (A)).In this way, gate drivers 12 are selected to a horizontal line of the object of display action.
Then, source electrode driver 13 supplies for the secondary pixel SPix of red pixel voltage VR as picture signal Vsig Source selector portion 13S (Figure 34 (B)) is given, and the switch control of high level is generated in a period of pixel voltage VR is supplied Signal VselR (t Figure 34 (C)).Moreover, source selector portion 13S passed through in the phase that switch controlling signal VselR is high level Pixel voltage VR that is interior to make switch SWR be on-state, being supplied from picture signal Vsig separation source electrode drivers 13, and will It supplies red secondary pixel SPix (Figure 34 (D)) by pixel signal line SGL as picture element signal VpixR.In addition, switch SWR is after off-state, keeps pixel signal line SGL voltage, so that pixel signal line SGL is changed into floating state (figure 34(D)。
Similarly, source electrode driver 13 will control for the secondary pixel SPix of green pixel voltage VG with corresponding switch Signal VselG supplies source selector portion 13S (Figure 34 (B), (C)) together, and source selector portion 13S is according to switch controlling signal VselG, picture element signal VG is separated from picture signal Vsig, and by pixel signal line SGL as picture element signal VpixG Supply to the secondary pixel SPix (Figure 34 (D)) of green.
Afterwards, similarly, source electrode driver 13 opens the pixel voltage VG for the secondary pixel SPix of blueness with corresponding Close control signal VselB and supply source selector portion 13S (Figure 34 (B), (C)) together, source selector portion 13S is controlled according to switch Signal VselB processed, picture element signal VB is separated from picture signal Vsig, and believed by pixel signal line SGL as pixel Number VpixB is supplied to the secondary pixel SPix (Figure 34 (D)) of blueness.
Next, gate drivers 12 make line n scan signal line GCL scanning signal Vscan (n) from height in timing t 3 Level transitions are low level (Figure 34 (A)).In this way, the horizontal secondary pixel SPix quilts involved by display action It is electrically separated from pixel signal line SGL.
Moreover, (1H) terminates during timing t 4 a, level, and (1H) starts during a new level, carries out next The display driving of row (the (n+1)th row).
Hereafter, by repeating above-mentioned action, the display device 1 with touch detection function in Pd, is passing through during each display Line sequential scan, carry out part viewing area RD display action.
Figure 35 is the timing diagram of the touch detection action of the display device with touch detection function, and (A) represents drive signal Vcom waveform, (B) represent touch detection signal Vdet waveform.
The Pt during touch detection of driving electrodes driver 14 successively supplies touch to two with drive signal VcomAC Part detection zone RTk, RTk+1 (Figure 35 (A)).The touch is sent to touch inspection with drive signal VcomAC by electrostatic capacitance Electrode TDL is surveyed, touch detection signal Vdet changes (Figure 35 (B)).A/D converter sections 43 with touch drive signal In sample time ts synchronous VcomAC, believe inputting the touch detection signal Vdet output of touch detection signal amplifying part 42 Number carry out A/D conversions (Figure 35 (B)).
Thus, the display device 1 with touch detection function during each touch detection Pt carry out part detection zone RTk, Touch detection action in RTk+1.
(timing on storage write-in WM and display driving DD)
Next, DD timing is driven to illustrate storage write-in WM and display.
Figure 36 is the storage write-in WM of the display device with touch detection function and storage read (display driving DD) when Sequence figure.A horizontal line is sequentially written in 1/10 data (storage write-in WM) in the image information of a frame part to memory 11a one by one. Moreover, memory 11a write-in Data Data by capped and before eliminating, horizontal line order reads the write-in one by one Data.Moreover, carry out display driving DD according to the data of the reading.That is, display driving DD corresponds to read from memory Data (storage read) display driving.
Display device 1 with touch detection function is set before the data in writing memory 11a are capped and eliminated The timing of (display driving DD) is read in storage write-in WM and storage, so as to safely read the data.Specifically, example Such as, part P1 top row data are after timing t w1 is written into, in order to be eliminated in timing t w2 by writing next data, The storage for setting the data between timing t w1 and timing t w2 is needed to read the timing t r1 of (display driving DD).In addition, example Such as, part P1 bottom row data are after timing t w2 is written into, in order to be eliminated in timing t w3 by writing next data, The storage for setting the data between timing t w2 and timing t w3 is needed to read the timing t r2 of (display driving DD).
If it is considered that the timing margin of action, for example, timing t r1 preferably sets the centre in timing t w1 and timing t w2 Near, similarly, timing t r2 is preferably set near timing t w2 and timing t w3 centre.
Figure 37 is the storage write-in WM of the display device with touch detection function and storage read (display driving DD) its His timing diagram, (A) represent the early situation of display driving DD timing, and (B) represents the slow situation of display driving DD timing.
As shown in Figure 37 (A), in the case of display driving DD timing morning, for example, the bottom row data due to part P1 Back to back timing t r2 is read after being just written into timing t w2, therefore causes timing margin to tail off.On the other hand, As shown in Figure 37 (B), in the case where display driving DD timing is slow, for example, because part P2 top row data are will be Timing t r1 before timing t w2 writes next data is read, therefore is similarly resulted in timing margin and tailed off.
Therefore, as shown in figure 36, preferably will be from timing t r1 to timing in storage write-in WM and display driving DD sequential Tw2 time be set as with it is roughly equal from timing t w2 to timing t r2 time.In this way, can increase more than timing Amount.
(preventing for the maloperation acted on touch detection)
In capacitive touch panel, noise (do by noise as caused by reverse phase fluorescent lamp and AM ripples, AC power supplies etc. Disturb) touch panel may be propagated to, so as to cause maloperation.The maloperation is due to can not distinguish on there is the letter of no touch Number (touch signal) and noise jamming.In the display device 1 with touch detection function, due to touch drive signal can be made VcomAC frequency drivingly changes independently of display, therefore, can suppress this maloperation.It is specifically described below.
Figure 38 (A), (B) be touch drive signal VcomAC frequency height in the case of touch detection action sequential Figure, Figure 38 (C), (D) be touch drive signal VcomAC frequency it is low in the case of touch detection action timing diagram, figure In 38, (A) and (C) represents drive signal Vcom waveform, and (B) and (D) represents touch detection signal Vdet waveform.
As shown in Figure 38 (A), (C), the display device 1 with touch detection function makes touch drive signal VcomAC frequency Rate changes, and the sampling frequency of A/D converter sections 43 is changed.In this way, can reduce due to noise The risk of the maloperation of the touch detection action of interference.
That is, when the frequency of noise jamming is near sampling frequency fs integral multiple, if the noise jamming is changed in A/D Portion 43 carries out A/D conversions, then causes the noise jamming to occur near frequency 0 as so-called aliasing noise.Thus, frequency The aliasing noise is mixed with touch signal near 0, therefore cannot be distinguished from touch signal and noise signal.Due to being touched in band Touch drive signal VcomAC frequency and the sampling frequency of A/D converter sections 43 can be made in the display device 1 of detection function Change, therefore the condition not influenceed by noise jamming can be selected, so as to carry out touch detection.
In the display device 1 with touch detection function, by the way that the image of the frame part write is believed by memory 11a 1/10 data in breath are read with speed more faster than the writing speed, so as to Pd during shortening display, it is ensured that touch detection Period Pt.Moreover, in the display device 1 with touch detection function, by effectively utilizing touching of being ensured by this way Pt during detecting is touched, and touch is changed with drive signal VcomAC frequency, it is possible to achieve prevents touch detection from acting Maloperation purpose.
(action under sleep pattern)
Below, the action under the sleep pattern of the display device 1 with touch detection function is illustrated.Figure 39 is to represent The flow chart of action under the sleep pattern of display device with touch detection function.Figure 40 is shown with touch detection function The timing waveform example of display device.(A) shown in Figure 40 represents scanning signal Vscan waveform.(B) shown in Figure 40 represents picture Plain signal Vpix waveform.(C) shown in Figure 40 represents drive signal Vcom waveform.
When starting the processing shown in Figure 39, first, touch detection control unit 100 is standby as step S101, Zhi Daojian Measure the object proximities such as finger or contact touch detection electrode TDL.Touch detection control unit 100 can by described above from Capacitive way, detection object to touch detection electrode TDL near to or in contact with.
Touch detection control unit 100 once detects object proximity or contact touch detection electrode TDL, then as step S102, the scan instruction being scanned to the driving electrodes COML of the display device 10 with touch detection function is sent to control Portion 100.As step S103, the control unit 100 for receiving scan instruction is driven by low-voltage (power source voltage Vcc), started The driving electrodes COML of display device 10 with touch detection function is scanned.That is, control unit 100 passes through power supply Voltage vcc makes source electrode driver 13, driving electrodes driver 14 and gate drivers 100D actions, starts to band touch detection work( The driving electrodes COML of the display device 10 of energy is scanned.
In addition, in step s 103, control unit 100 acts gate drivers 100D, rather than makes gate drivers 12 Action, the reason for being scanned to the driving electrodes COML of the display device 10 with touch detection function, are as follows.Gate drivers 12 be that the supply voltage Vdd generated by booster circuit 70 is acted, to make the TFT elements Tr in liquid crystal display device 20 high Act fastly and carry out the circuit that image is shown at high speed.In sleep pattern, in order to reduce power consumption, preferably make booster circuit 70 Stopping acts.Booster circuit 70 from start action untill output supply voltage Vdd, have about hundreds of ms time lag.Therefore, If control unit acts booster circuit 70 and gate drivers 12 is acted and is carried out the display with touch detection function The driving electrodes COML of device 10 scanning, then produce about hundreds of ms time lag.Therefore, control unit 100 makes by supplying often The gate drivers 100D actions for the power source voltage Vcc action given, and carry out the drive of the display device 10 with touch detection function Moving electrode COML scanning.In this way, the display device 1 with touch detection function can suppress touching under sleep pattern Touch the time lag of detection.
Scanning signal Vscan is changed into high level by reference picture 40, gate drivers 100D in timing t 50 by low level (Figure 40 (A)).Before this, picture element signal Vpix is set as setting, such as 0V (Figure 40 by source electrode driver 13 in advance (B)).Thus, 0V is written into pixel Pix (secondary pixel SPix).In more detail, pixel electrode 22 is set to 0V.Then, grid Driver 100D makes scanning signal Vscan change into low level (Figure 40 (A)) by high level in timing t 51.Thus, pixel Pix (secondary pixel SPix) value is defined as 0V.In more detail, the current potential of pixel electrode 22 is defined as 0V.
Then, driving electrodes driver 14 applies touch drive signal in 52~t53 of timing t to driving electrodes COML VcomAC applies touch drive signal in 54~t55 of timing t as drive signal Vcom (B (k)) to driving electrodes COML VcomAC applies touch drive signal in 56~t57 of timing t as drive signal Vcom (B (k+1)) to driving electrodes COML VcomAC is as drive signal Vcom (B (k+2)).In this way, driving electrodes COML is scanned, touch detection control unit 100, by the mutual capacitance mode between the driving electrodes COML and touch detection electrode TDL of described above, can detect touch Coordinate and gesture.
In addition, applying touch to driving electrodes COML in 52~t57 of timing t is used as drive signal by the use of drive signal VcomAC Before Vcom, in advance in 50~t51 of timing t to pixel Pix (secondary pixel SPix) writing pixel signal Vpix's (being here 0V) Reason is as follows.Due to being shown in sleep pattern without image, therefore pixel Pix (secondary pixel SPix) value is indefinite.It is more detailed Carefully say, the current potential of pixel electrode 22 is indefinite.In this state, if applying touch drive signal to driving electrodes COML VcomAC is applied in unexpected voltage as drive signal Vcom, then liquid crystal cell LC, the display with touch detection function Part 10 is it is possible that image retention.This image retention is temporary transient, through that can disappear after a while, but before disappearance, Fogging image or operator can feel under the weather.Therefore, touch drive signal is being applied to driving electrodes COML Before VcomAC is as drive signal Vcom, by advance to pixel Pix (secondary pixel SPix) writing pixel signals Vpix (here For 0V), pixel Pix (secondary pixel SPix) value stabilization can be made, make the current potential of pixel electrode 22 stable, and suppress liquid crystal cell LC is applied in unexpected voltage, prevents the generation of above-mentioned image retention.Thus, the display device 1 with touch detection function can To suppress fogging image, or the sticky feeling brought to operator.
In addition, writing pixel Pix (secondary pixel SPix) picture element signal Vpix is not limited only to 0V (low level) in advance, also may be used To be the level among high level (power source voltage Vcc) or high level and low level.For example, when the display with touch detection function Device 10 is normal white (ノ ー マ リ ー ホ ワ イ ト) display device in the case of, if in advance to pixel Pix (secondary pixels SPix the picture element signal Vpix, the then display device 10 with touch detection function of high level display picture blackening) are write, is not easy Sticky feeling is brought to operator.Moreover, for example, when the display device 10 with touch detection function is normally-black (ノ ー マ リ ー Block ラ ッ Network) display device in the case of, if writing low level picture element signal to pixel Pix (secondary pixel SPix) in advance Vpix, the then display device 10 with touch detection function display picture blackening, are not easy to bring sticky feeling to operator.
Referring again to Figure 39, as step S104, touch detection control unit 100 once detect defined gesture (for example, Slip (ス ワ イ プ) of specific length in the prescribed direction etc.), then processing is entered step S105, if being not detected by rule Fixed gesture, then processing is set to enter step S101.
Touch detection control unit 100, then as step S105, will instruct once detecting defined gesture in step S104 Send to application processor.As step S106, the application processor for receiving instruction sends sleep release instruction to tactile Touch the display device 1 of detection function.In more detail, application processor sends sleep release instruction to band touch detection function Display device 1 control unit 11.As step S107, the display with touch detection function for receiving sleep release instruction fills Put 1 and sleep pattern is changed into normal operating mode.At this moment, the control unit 11 of the display device 1 with touch detection function starts Perform the action of booster circuit 70 and backlight.In this way, the display device 1 with touch detection function can carry out figure As display.
[effect]
As described above, the display device 1 with touch detection function that embodiment 1 is related to passes through in a sleep mode right Driving electrodes COML applies touch with before drive signal VcomAC, in advance by picture element signal Vpix writing pixels Pix (secondary pixels SPix), make pixel Pix (secondary pixel SPix) value stabilization, and make the current potential of pixel electrode 22 stable.Thus, band touches inspection The display device 1 of brake can suppress to apply unexpected voltage to liquid crystal cell LC, and suppress the generation of image retention.It is logical This mode is crossed, the display device 1 with touch detection function can suppress fogging image, or bring to operator uncomfortable Sense.
In addition, the display device 1 with touch detection function makes the grid acted by power source voltage Vcc in a sleep mode Driver 100D is acted, and carries out the driving electrodes COML of the display device 10 with touch detection function scanning.Thus, band touches Touching the display device 1 of detection function can stop booster circuit and reduce power consumption, and suppress the time lag of touch detection.
Moreover, on the display panel with touch detection function that embodiment 1 is related to, make display driving voltage VcomDC is supplied to driving electrodes COML display with wiring LDC and is supplied touch to driving electrodes with drive signal VcomAC COML touch wiring LAC winding edge regions.For example, in the liquid crystal of the liquid crystal using lateral electric field modes such as FFS Show in equipment, when will show with the pixel corresponding to wiring LDC is configured to close colour gamut 32R, 32G, 32B, display function layer is in The trend of operating stably.Therefore, selecting switch SW1 (SW2, SW3, SW4) is configured at touch wiring LAC and display wiring Between LDC.Selecting switch SW possesses connection conductor Q1, Q2 and Q3 in the different through hole of stratum.Selecting switch SW1 (SW2, SW3, SW4) corresponding each driving electrodes COML has multiple switch COMSW, according to switch controlling signal Ssw, Sxsw to each Driving electrodes COML is acted, and so as to connect touch wiring LAC and driving electrodes COML, applies touch drive signal VcomAC.Thus, by connection conductor Q1, Q2, Q3 for increasing power supply quantity, the connection in selecting switch SW1 can be reduced Resistance.
Touch wiring LAC has：Switch SW1 defined connection resistance components and for belonging to by the touch Drive signal VcomAC driving electrodes block B driving electrodes COML parasitic capacitance is supplied with wiring LAC.Therefore, exist It is configured in the driving electrodes block B on the position for leaving COG19 (drive signal generating unit), drive signal VcomAC arteries and veins is present Transit time of punching elongated possibility.On the other hand, the selecting switch SW1 (SW2, SW3, SW4) involved by embodiment 1 is right Each driving electrodes COML is answered to possess multiple switch COMSW COMS switches COMS1, cmos switch CMOS2, and in touch cloth It is connected in parallel between line LAC and driving electrodes COML, according to the switch controlling signal of alternatively signal, corresponding to each driving Electrode COML is acted, and so as to connect touch wiring LAC and driving electrodes COML, applies touch drive signal VcomAC.Also, in the display device 1 with touch detection function involved by embodiment 1, it can reduce switch SW1's Connect resistance.As a result, the display device 1 with touch detection function that embodiment 1 is related to can suppress to be configured at touch use Connect up the transit time elongated possibility of the pulse of the drive signal VcomAC in the driving electrodes block B near LAC terminal part Property.
(comparative example)
Next, contrasted with the display device 1R with touch detection function that comparative example is related to, to present embodiment Effect illustrate.Display device 1R with touch detection function (1H) during a level carries out display action and touched to examine Both survey actions.Others are formed and the mode (Fig. 1 etc.) of this implementation is identical.
Figure 41 is display action and touch detection action in the display device with touch detection function that comparative example is related to Timing diagram, (A)~(D) represent by during level (1H) time shorten situation, (E)~(H) represent by during level The situation of the time lengthening of (1H).In Figure 41, (A) and (E) represents scanning signal Vscan waveform, and (B) and (F) represents figure As signal Vsig waveform, (C) and (G) represents drive signal Vcom waveform, and (D) and (H) represents touch detection signal Vdet Waveform.
In the display device 1R with touch detection function that this comparative example is related to, (1H) is set with tactile during a level Pd during touching Pt during detecting and showing.I.e., in the display device 1R with touch detection function, during a level (1H) Interior, Pt carries out touch detection action first during touch detection, and then Pd carries out display action during display.
In the touch detection action that the present embodiment is related to, first, the Pt during touch detection of driving electrodes driver 14 Pulse P (Figure 41 (C), (G)) is applied to the driving electrodes COML for belonging to part detection zone RTk.Pulse P passes through electrostatic capacitance Touch detection electrode TDL is transferred to, touch detection signal Vdet changes (Figure 41 (D), (H)).A/D converter sections 43 with arteries and veins The synchronous sampling timing t s of P are rushed, the output signal for the touch detection signal amplifying part 42 for having touch detection signal Vdet will be inputted Carry out A/D conversions (Figure 41 (D), (H)).In this way, the display device 1R with touch detection function carries out part detection Touch detection action in the RTk of region.In addition, display action fills with the display of the present embodiment with touch detection function It is identical to put 1.
As shown in figure 41, the display device 1R with touch detection function that this comparative example is related to passes through during a level is made It is synchronous while the time change of (1H), change the sampling timing in A/D converter sections 43, can reduce due to interference The possibility of the maloperation of the touch detection action of noise.However, in this case, due to the display with touch detection function The timing of device 1R supply signal of video signal is different from the timing of actual displayed, therefore results in the need for frame memory.It is additionally, since one The time of (1H) is changed during level, therefore the image quality shown is likely to decrease.During being additionally, since a level The time of (1H) by display action limited and can not great changes will take place, therefore be able to not may also fully reduce touch inspection The maloperation of survey action.
On the other hand, in the display device 1 of the present embodiment with touch detection, due to showing according to each part Show that region RD carries out display driving, therefore memory 11a memory capacity can be decreased in the RD of the part viewing area The degree of data volume.
Moreover, in the display device 1 with touch detection function, Pt time and display phase during touch detection is made Between Pd time keep certain in the state of so that the frequency of the touch drive signal VcomAC during touch detection in Pt changes Become.Keep certain thereby, it is possible to the time of (1H) during the level in Pd during making display, therefore the figure of display can be reduced As the possibility of quality decline.Moreover, in the display device 1 with touch detection function, due to can be not by display action Limitation in the case of, touch drive signal VcomAC frequency is significantly changed, therefore related to this comparative example And the situation of the display device 1R with touch detection function compare, the maloperation of touch detection action can be reduced.
In other words, in the display device 1R with touch detection function that this comparative example is related to, due to during touch detection During Pt is set in a level in (1H), therefore the action for causing to perform within this limited short time is restricted. In other words, cause in the display device 1R with touch detection function, the free degree for touch detection action reduces.
On the other hand, in the display device 1 of the present embodiment with touch detection function, by by memory 11a reads 1/10 data in the image information of write frame part with speed more faster than writing speed, aobvious so as to shorten Show period Pd, it is ensured that Pt during touch detection.I.e., in the display device 1 with touch detection function, it is used for due to being able to ensure that The long-time of the concentration of touch detection action, therefore the free degree of touch detection action can be improved.
As described above in the present embodiment, due to having carried out display driving according to each part viewing area, accordingly, it is capable to The enough memory capacity by memory is controlled to be relatively low.
Moreover, in the present embodiment, due to reading data from memory with speed more faster than writing speed, because This, it can be ensured that is during the prolonged touch detection of concentration, so as to improve the free degree of touch detection action.
Moreover, in the present embodiment, drive touch due to interior during the prolonged touch detection of the concentration The frequency of signal is changed, and therefore, it is possible to not influence display action, reduces touch detection action and the possibility of maloperation occurs Property.
[variation 1-1]
Above-mentioned embodiment be to show that 2 speeds of scanning carry out touch detection scanning, but be not limited only to this, take and Instead of, can also speed progress more faster than 2 times for example, speed that can be slower than 2 times is carried out.Figure 42 is schematically to show Go out with the display device with touch detection function display scan 4 speeds carry out touch detection scanning when action figure. In this example embodiment, the Pt during touch detection of driving electrodes driver 14 successively supplies touch to 4 with drive signal VcomAC Individual part detection zone RT.Thus, once shown in execution in the time of scanning, 4 touch detections scanning can be carried out.
[variation 1-2]
In the above-described embodiment, part viewing area RT and part detection zone RD is by display surface/touch detection Face is divided into the region after 10 parts, but is not limited only to this, for example, part viewing area RD size and part detection zone RT Size can also be different from each other.Figure 43 is to schematically show the part detection zone for making the display device with touch detection function The figure of action when RT size is the half of part viewing area RD size.In this example embodiment, part viewing area RD is Display surface is divided into the region after 10 parts, and part detection zone RT is that touch detection face is divided into the region after 20 parts.
[variation 1-3]
In the above-described embodiment, one part of memory 11a interim storages viewing area RD data, but be not limited only to This, replaces, for example, it is also possible to interim storage some viewing area RD data volume.Figure 44 is to schematically show The figure of action during 2 parts viewing area RD of display device of the interim storage with touch detection function data.Even in In this case, compared with frame memory, also can the memory capacity of memory be suppressed relatively low.
[variation 1-4]
In the above-described embodiment, when performing touch detection action, the driving electricity of regulation bar number is included according to each Pole COML part detection zone RT is driven and scanned, but is not limited only to this, replaces, for example, it is also possible to by While driving the driving electrodes COML of regulation bar number simultaneously, seriatim the driving electrodes COML driven is shifted to scan. Below, it is described in detail.
Figure 45 to Figure 47 is one of the touch detection action for schematically showing the display device with touch detection function Figure.The driving electrodes driver 14D that this variation is related to is to the driving electrodes COML of regulation bar number while applies touch and drives Dynamic signal VcomAC.Specifically, driving electrodes COMLs of the driving electrodes driver 14D to regulation bar number (being 5 in this example) Apply touch drive signal VcomAC (oblique line portion) simultaneously.Moreover, driving electrodes driver 14D is by using applying to touch Drive signal VcomAC driving electrodes COML shift one by one to carry out touch detection scanning.In addition, in this example, to 5 Bar driving electrodes COML applies touch drive signal VcomAC simultaneously, but is not limited only to this, replaces, can also be to 4 Below or more than 6 driving electrodes COML simultaneously apply touch drive signal VcomAC.In addition, in this example, to applying Touch is shifted one by one with drive signal VcomAC driving electrodes COML, but is not limited only to this, is replaced, can also be right Every more than 2 are shifted.
[variation 1-5]
In the above-described embodiment, memory 11a memory capacity corresponds to the 1/10 of the image information of a frame part, but not This is only limitted to, is replaced, for example, can correspond to the 1/20 of the image information of a frame part, may correspond to a frame part The 1/5 of image information.
[variation 1-6]
In the above-described embodiment, when carrying out display action, driving electrodes driver 14 applies to driving electrodes COML Driving voltage VcomDC is used in display, but is not limited only to this, is replaced, and is exchanged for example, it is also possible to apply to driving electrodes COML Drive signal, carry out so-called COM reverse drives.
[variation 1-7]
Source selector portion 13S is provided with the above-described embodiment, from the image letter supplied by source electrode driver 13 Number Vsig separation picture element signal Vpix is simultaneously supplied to liquid crystal display device 20, but is not limited only to this, is replaced, can not also be set Source selector portion 13S is put, and picture element signal Vpix is directly supplied to liquid crystal display device 20 from source electrode driver 13.
[variation 1-8]
In the above-described embodiment, alternately part viewing area RD image shows tactile with part detection zone RT Detection is touched, but is not limited only to this, is replaced, the image for carrying out a picture (frame) can also be concentrated to show, in the image The touch detection in whole touch detection region is carried out before or after display.
<1-2. embodiments 2>
Next, the display device with touch detection function that embodiment 2 is related to is illustrated.Figure 48 is to show reality Apply the figure of one of the touch detection apparatus for the display device with touch detection function that mode 2 is related to.Figure 49 and Figure 50 is to show Go out the figure of the test section for the display device with touch detection function that embodiment 2 is related to.
The touch detection device that the embodiment 1 of described above is related to has been detected by self-capacitance mode in a sleep mode No touch.On the other hand, the touch detection device that embodiment 2 is related to is detected the presence of by mutual capacitance mode in a sleep mode Touch.
As shown in figure 48, touch detection device 30 matches touch detection electrode TDLa and touch detection electrode TDLb, should Pairing is formed with multiple.
Figure 49 is to show a pair of touch detection electrode TDLa and touch detection electrode TDLb and electricity in a sleep mode Press detector (touch detection portion) DET figure.Voltage detector DET can also be built in touch detection control unit 100.
In a sleep mode, switch 211 is connected, and drive signal VcomAC is applied on touch detection electrode TDLa.Touch Touch detecting electrode TDLa and touch detection electrode TDLb and form capacity cell C4, finger not in contact with or in the case of with And finger contacts or in the case of, electric capacity changes.Voltage detector DET is connected with touch detection electrode TDLb, root According to touch detection electrode TDLb voltage, it is capable of detecting when what is be made up of touch detection electrode TDLa and touch detection electrode TDLb The change of electric capacity, that is, be capable of detecting when whether finger contacts or approach.
Figure 50 be show a pair of touch detection electrode TDLa under normal operating mode and touch detection electrode TDLb and Voltage detector DET figure.Under normal operating mode, switch 211 disconnects, and the driving that touch detection electrode TDLa applies is believed Number VcomAC is shielded.Moreover, switch 212 is connected, touch detection electrode TDLa is connected on voltage detector DET.Pass through this Kind mode, touch detection electrode TDLa and touch detection electrode TDLb and driving electrodes COML form mutual capacitance respectively.Moreover, drive Dynamic signal VcomAC is applied on driving electrodes COML, and voltage detector DET is according to touch detection electrode TDLa and touches inspection Touch can be detected by surveying electrode TDLb voltage.
[effect]
The touch detection device 30 that embodiment 2 is related to different can be detected the presence of tactile by mutual capacitance mode in a sleep mode Touch.Thus, the touch detection device 30 that embodiment 2 is related to can accurately detect the presence of touch by self-capacitance mode.
<1-3. embodiments 3>
Next, the display device with touch detection function that embodiment 3 is related to is illustrated.Figure 51 is to show reality Apply the figure for the display device with touch detection function that mode 3 is related to.In addition, pair with illustrated in above-mentioned embodiment 1 it is interior Hold same inscape mark identical symbol, and the repetitive description thereof will be omitted.
As shown in figure 51, the display device 1 with touch detection function that embodiment 3 is related to is to possess gate drivers 12C replaces the gate drivers 12B and gate drivers of the display device 1 with touch detection function that embodiment 1 is related to 100D.Gate drivers 12C is in power source voltage Vcc and the movable circuit of supply voltage Vdd both of which.Gate drivers 12C is (such as big in the power source voltage Vcc (such as about 3V to 5V) and supply voltage-Vcc powered often in a sleep mode About -3V is to -5V) under act, and scanning signal Vscan is applied to scan line GCL.Moreover, gate drivers 12C is in routine operation It is (such as big in the supply voltage Vdd (such as about 5V to 10V) and supply voltage-Vdd generated by booster circuit 70 under pattern About -5V is to -10V) under act, and scanning signal Vscan is applied to scan line GCL.
[effect]
The display device 1 with touch detection function that embodiment 3 is related to replaces implementing to possess gate drivers 12C The gate drivers 12B and gate drivers 100D for the display device 1 with touch detection function that mode 1 is related to.Thus, implement The display device 1 with touch detection function that mode 3 is related to can make edge Gd narrow, and can make electronics miniaturization.
<1-4. embodiments 4>
Next, the display device 1 with touch detection function being related to embodiment 4 illustrates.Figure 52 is to show The figure of one of the control device for the display device with touch detection function that embodiment 4 is related to.Figure 53 is to show embodiment party The block diagram of the drive division for the driving electrodes driver that formula 4 is related to.Figure 54 is to show the driving electrodes driver that embodiment 4 is related to Selecting switch configuration example block diagram.In addition, pair with the content identical constitution element mark that illustrated in above-mentioned embodiment 1 Identical symbol is noted, and the repetitive description thereof will be omitted.Figure 53 and Figure 54 illustrates to the composition of first grid driver 12A sides, Second grid driver 12B composition is also identical.
As shown in figure 52, pixel substrate 2 is located at the surface of the TFT substrate 21 of transparent insulation substrate (such as glass substrate) On, possess：Viewing area Ad, the source electrode driver of multiple pixels including liquid crystal cells are configured with rectangular (ranks shape) (horizontal drive circuit) 13 and gate drivers (vertical drive circuit) 12A, 12B and 100D.Gate drivers are (vertical to drive Dynamic circuit) 12A, 12B as first grid driver 12A, second grid driver 12B in a manner of clipping viewing area Ad and Configuration.First grid driver 12A, second grid driver 12B are under normal operating mode, to the scan line of scanning direction GCL alternately applies vertical scanning pulse, and viewing area Ad each secondary pixel SPix is selected with row unit.First grid drives Device 12A and second grid driver 12B is configured at the end of scan line GCL length direction, to every the scan line GCL of one Alternately apply vertical scanning pulse, and viewing area Ad each pixel is selected with row unit.
Therefore, as shown in figure 53, in first grid driver 12A sides or second grid driver 12B sides, beyond viewing area Domain Ad and by edge Gd and reach first grid driver 12A or second grid driver 12B scan line GCL number become It is few.Therefore, on edge Gd, the scan line GCL of odd number or even number is from viewing area Ad and first grid driver 12A or second Pass through between gate drivers 12B.As a result, selecting switch SW1 COMS switches COMS1 is configured in and is located at and touch cloth (for example, scan line GCL between the scan line GCL of line LAC (display wiring LDC) crossings on different levelm+1With scan line GCLm+3It Between) region on.For example, it is connected to first grid driver 12A scan line GCL (such as scan line GCLm+1And scan line GCLm+3) with the touches of first grid driver 12A sides wiring LAC crossings on different level, with touching for second grid driver 12B sides Touch does not have crossings on different level with wiring LAC.Moreover, it is connected to second grid driver 12B scan line (such as scan line GCLm+2 With scan line GCLm+4) with the touches of second grid driver 12B sides wiring LAC crossings on different level, with first grid drive-side Touch wiring LAC there is no crossings on different level.Therefore, with touching the scanning with wiring LAC (display wiring LDC) crossings on different level Interval between line GCL becomes bigger than the mutual intervals of adjacent scanning lines GCL in the Ad of viewing area.That is, side The interval of scan line GCL in edge Gd becomes more spaced at greater than the adjacent scanning lines GCL in the Ad of viewing area.It is additionally, since At edge, Gd upper tracers GCL interval expands, therefore can configure selecting switch SW1 (cmos switch CMOS1, cmos switch CMOS2 area increase).For example, number or increase area by increasing connection conductor Q1, Q2, Q3, can reduce selection and open Close the connection resistance in SW1.
In addition, selecting switch SW1 is not only configured at the fringe region Gd of first grid driver 12A sides, is also configured at The fringe region Gd of two gate drivers 12B sides.Configure the selecting switch in the fringe region Gd of second grid driver 12B sides SW1 being capable of touch of the option and installment in the second grid driver 12B sides connection or display for connecting up LAC and driving electrodes COML With wiring LDC and driving electrodes COML connection.In this case, the selecting switch and second of first grid driver 12A sides In the selecting switch of gate drivers 12B sides, the selecting switch for being connected to identical driving electrodes COML selects together separately from each other The wiring (touching with wiring LAC or display wiring LDC) of type.Such as the selecting switch with first grid driver 12A sides SW1 is connected to the selecting switch SW1 of identical driving electrodes COML second grid driver 12B sides, is driven in first grid In the case that the selecting switch SW1 selections of device 12A sides touch the connection with wiring LAC and driving electrodes COML, selection, which touches, to be used Connect up LAC and driving electrodes COML connection.Identical is connected to the selecting switch SW1 of first grid driver 12A sides to drive The selecting switch SW1 of moving electrode COML second grid driver 12B sides, the selecting switch in first grid driver 12A sides In the case of connection of the SW1 selection displays with wiring LDC and driving electrodes COML, selection display wiring LDC and driving electrodes COML connection.
[effect]
As tdescribed in embodiment 1, when being configured with choosing between the scan line GCL in a spacing corresponding to secondary pixel SPix When selecting switch SW1, if pel spacing narrows with high precision int, selecting switch SW1 connection resistance is likely to increase. On the other hand, in the display device 1 with touch detection function that embodiment 4 is related to, due to can be than corresponding to secondary picture Selecting switch SW1 is configured in the scan line GCL of plain SPix spacing interval spaced at greater, therefore, even if between pixel Away from narrowing with high precision int, also the connection resistance for switching SW1 can be maintained reduced levels.Moreover, supplied by increasing Connection conductor Q1, Q2, Q3 of electricity number, can reduce the connection resistance in selecting switch SW1.
Touch wiring LAC has：Switch SW1 defined connection resistance components and used by the touch belonging to Wiring LAC is fed with drive signal VcomAC driving electrodes block B driving electrodes COML parasitic capacitance.Therefore, configuring In the driving electrodes block B on the position for leaving COG19 (drive signal generating unit), drive signal VcomAC pulse be present Transit time elongated possibility.On the other hand, in the selecting switch SW1 (SW2, SW3, SW4) that embodiment 4 is related to, each Driving electrodes COML is provided with multiple switch COMSW COMS switches COMS1, cmos switch CMOS2, and is connected up in touch It is connected in parallel between LAC and driving electrodes COML, according to the switch controlling signal of alternatively signal, corresponding to each driving electricity Extremely acted, so as to connect touch wiring LAC and driving electrodes COML, apply touch drive signal VcomAC.Also, the display device 1 with touch detection function that embodiment 4 is related to can reduce switch SW1 connection electricity Resistance, and the mistake in the pulse for the driving electrodes block B drive signals VcomAC being configured near wiring LAC terminal part can be suppressed Cross time elongated possibility.
In addition, the switch SW1 involved by embodiment 4 can make the direction parallel with scan line diminish, make and scan line Orthogonal direction becomes big.Thus, the display device 1 with touch detection function involved by embodiment 4 can make in edge Gd , the width on the parallel direction of scan line taken with switch SW1, the width G dv shown in Fig. 7 reduce.
<1-5. embodiments 5>
Below, the display device 1 with touch detection function involved by embodiment 5 is illustrated.Figure 55 is to show The block diagram of the drive division of the driving electrodes driver of the display device with touch detection function involved by embodiment 5.Figure 56 It is matching somebody with somebody for the selecting switch for the driving electrodes driver for showing the display device with touch detection function involved by embodiment 5 Put the block diagram of example.In addition, pair content identical inscape illustrated with above-mentioned embodiment 1 into embodiment 4 marks Identical symbol, and omit repeat specification.Figure 55 and Figure 56 enters to the driving electrodes driver of first grid driver 12A sides Explanation is gone, but second grid driver 12B composition is also identical.
As shown in figure 52, it is also that pixel substrate 2 is located at transparent insulation substrate (such as glass substrate) in embodiment 5 The surface of TFT substrate 21, and possess：The viewing area of multiple pixels including liquid crystal cells is configured with rectangular (ranks shape) Ad, source electrode driver (horizontal drive circuit) 13, gate drivers (vertical drive circuit) 12A, 12B and 100D.Raster data model Device (vertical drive circuit) 12A, 12B is as first grid driver 12A, second grid driver 12B to clip viewing area Ad mode and configure.First grid driver 12A, second grid driver 12B are under normal operating mode to scanning direction Above-mentioned scan line alternately apply vertical scanning pulse, viewing area Ad each secondary pixel SPix is selected with row unit.
As shown in figure 55, in first grid driver 12A sides or second grid driver 12B sides, more than viewing area Ad And tailed off by edge Gd to reach first grid driver 12A or second grid driver 12B scan line GCL quantity. In addition, it is configured with multi-strip scanning line GCL between adjacent switch COMSWm+2, scan line GCLm+4(multi-strip scanning line GCLm+6、 Scan line GCLm+8).This is with first grid driver 12A (second grid driver 12B) gate shift register 120SR's Cycle is consistent.Gate shift register 120SR is controlled using two scan line GCL as a pair.Therefore, in selecting switch In SW1, switch COMSW turns into secondary pixel SPix four spacing, and repetition interval is identical with eight secondary pixel SPix.Thus, exist In edge Gd, the scan line GCL of odd number or even number is driven by viewing area Ad and first grid driver 12A or second grid Between device 12B.Handed over as a result, cmos switch CMOS2 is configured at positioned at touch wiring LAC (display connects up LDC) solid Between fork and the scan line GCL adjacent with cmos switch CMOS1, cmos switch CMOS2 (such as scan line GCLm+4With sweep Retouch line GCLm+6Between) region.For example, scan line GCL (such as the scan line GCL being connected with first grid driver 12Am+2、 Scan line GCLm+4, scan line GCLm+6, scan line GCLm+8) three-dimensional with wiring LAC with the touch of first grid driver 12A sides Intersect, the wiring LAC not crossings on different level of the touch with second grid drive-side.Also, it is connected with second grid driver Scan line (such as scan line GCLm+1, scan line GCLm+3, scan line GCLm+5, scan line GCLm+7) and second grid drive-side Touch wiring LAC crossings on different level, with the touch of first grid drive-side wiring LAC not crossings on different level.Therefore, with touching Touch adjacent more than in the Ad of viewing area with the mutual intervals of scan line GCL of wiring LAC (display connects up LDC) crossings on different level The mutual intervals of scan line GCL.Also, because the interval of the scan line GCL in edge Gd expands, therefore selecting switch SW1 (cmos switch CMOS2's) can configure area increase.For example, quantity or increase face by increasing connection conductor Q1, Q2, Q3 Product, can reduce the connection resistance in selecting switch SW1.
In addition, selecting switch SW1 not only configures the fringe region Gd in first grid driver 12A sides, is also disposed at The fringe region Gd of two gate drivers 12B sides.Configure the selecting switch in the fringe region Gd of second grid driver 12B sides SW1 can be with the touch connection that connects up LAC and driving electrodes COML or aobvious of the option and installment in second grid driver 12B sides Show the connection with wiring LDC and driving electrodes COML.In this case, the selecting switch of first grid driver 12A sides and Selected separately from each other with the selecting switch of identical driving electrodes COML connections in the selecting switch of second grid driver 12B sides The wiring (touching with wiring LAC or display wiring LDC) of identical type.Such as the selection with first grid driver 12A sides Switch SW1 is connected to the selecting switch SW1 of identical driving electrodes COML second grid driver 12B sides, in first grid In the case that the selecting switch SW1 of driver 12A sides have selected touch wiring LAC and driving electrodes COML connection, selection Touch the connection with wiring LAC and driving electrodes COML.Phase is connected to the selecting switch SW1 of first grid driver 12A sides The selecting switch SW1 of same driving electrodes COML second grid driver 12B sides, the choosing in first grid driver 12A sides Select switch SW1 have selected display wiring LDC and driving electrodes COML connection in the case of, selection display with connect up LDC with Driving electrodes COML connection.
[effect]
As shown in Embodiment 1, it is configured with selecting switch between the scan line GCL corresponding to a spacing in secondary pixel In the case of SW1, if pel spacing narrows with high precision int, the connection resistance that selecting switch SW1 be present is increased Possibility.On the other hand, can be by selecting switch in the display device 1 with touch detection function involved by embodiment 5 SW1 is configured in the interval spaced at greater of the scan line GCL corresponding to a spacing than secondary pixel SPix, therefore, even if Pel spacing narrows with high precision int, selecting switch SW1 connection resistance can also be maintained into reduced levels.In addition, By connection conductor Q1, Q2 and Q3 for increasing power supply quantity, the connection resistance in selecting switch SW1 can be reduced.
Touch wiring LAC has：Switch SW1 defined connection resistance components and to belonging to by touch cloth Line LAC is fed with drive signal VcomAC driving electrodes block B driving electrodes COML parasitic capacitance.Therefore, it is being configured at Leave in the driving electrodes block B on the position of COG19 (drive signal generating unit), the mistake of drive signal VcomAC pulse be present Cross time elongated possibility.On the other hand, the selecting switch SW1 (SW2, SW3, SW4) involved by embodiment 5 is corresponding each Driving electrodes COML possess multiple switch COMSW COMS switch COMS1, COMS switch COMS2, touch with wiring LAC and It is connected in parallel between driving electrodes COML, according to the switch controlling signal of alternatively signal, corresponding to each driving electrodes COML is acted, and so as to connect touch wiring LAC and driving electrodes COML, applies touch drive signal VcomAC.Also, in the display device 1 with touch detection function involved by embodiment 5, switch SW1 connection resistance Reduce, the mistake in the pulse for the driving electrodes block B drive signals VcomAC being configured near wiring LAC terminal part can be suppressed Cross time elongated possibility.
In addition, the switch SW1 involved by embodiment 5 can make the direction parallel with scan line diminish, make and scan line Orthogonal direction becomes big.Thus, the display device 1 with touch detection function involved by embodiment 5 can make in edge Gd , the width on the parallel direction of scan line taken with switch SW1, the width G dv shown in Fig. 7 reduce.
<1-6. embodiments 6>
Next, the display device with touch detection function involved by embodiment 6 is illustrated.Figure 57 is to show The figure of one of the module for the display device with touch detection function being provided with involved by embodiment 6.
As shown in figure 57, supply voltage V1 is supplied to COG19 by main substrate of battery or electronic equipment etc..The supply voltage V1 is not intended to the supply voltage of the display device 10 of drive belt touch detection function, but for receiving from touch IC10's Control signal and power supply IC200 to outside are controlled the low-voltage of the interface of the output etc. of signal (for example, 1.8V Deng) supply voltage.
Moreover, the power source voltage Vcc or Vdd for the display device 10 of drive belt touch detection function are by power supply IC200 Supply to COG19.The main substrates of supply voltage V2 (such as+3V, -3V etc.) by crossing battery or electronic equipment etc. are supplied to power supply IC200.Power supply IC200 has the function of booster circuit 70 of illustrating in above-mentioned embodiment 1, supply voltage V2 is boosted and Power source voltage Vcc (for example, 3V to 5V or so) or Vdd (for example, 5V to 10V or so) are generated, and supplies COG19.
In addition, here, power supply IC200 is configured at the outside of module, but can also configure in the inside of module.It is for example, electric Source IC200 can also be installed on flexible printed board T.
Figure 58 is the timing diagram of the action for the display device with touch detection function that embodiment 6 is related to, and (A) represents to touch Touch IC touch detection processing, (B) represent COG action, (C) represent touch IC action sequence, (D) represent touch IC to The control signal TRGT signals of COG outputs, (E) represent power supply IC output voltage.
In initial timing t60, touch IC110 and touch (Figure 58 is detected by touch detection electrode TDL self-capacitance mode (A)).COG19 is in sleep state, without the driving of the display device 10 with touch detection function, but can be from touch IC receives control signal (Figure 58 (B)).TRGT signals inactive (low level) (Figure 58 (D)).Power supply IC200 is in sleep state In, without boosting, output voltage 0V.
As shown in Figure 58 (C), IC110 is touched with predetermined time interval, passes through touch detection electrode TDL self-capacitance side Formula detection touches.In addition, predetermined time interval is, for example, 4ms or so.One detects touch, touches IC110 just in timing t 61 TRGT signals are made to quicken (high level).TRGT signals are sent to COG19 by Figure 57 signal wire from IC110 is touched.
In timing t 61, when TRGT signals one quicken, COG19 is just sent control signal by Figure 57 signal wire L2 To power supply IC200, power supply IC200 is set to recover from sleep state.It is in addition, here, high due to being displayed without without image Supply voltage Vdd, therefore, COG19 export power source voltage Vcc to power supply IC200.
Power supply IC200 after COG19 receives control signal, starts from dormant recovery in timing t 61 in timing t 61 Action, starts to boost, and supply power source voltage Vcc to COG19 in the timing t 62 after defined time delay.In addition, Defined time delay is, for example, about 8ms to 32ms.
COG19, using the power source voltage Vcc supplied by power supply IC200, starts driving electrodes COML drive in timing t 62 It is dynamic.That is, COG19 makes scanning signal Vscan be changed into high level from low level.Before this, COG19 is by picture element signal Vpix is previously set as setting such as 0V.Thus, 0V is written into pixel Pix (secondary pixel SPix).In more detail, pixel electricity Pole 22 is set to 0V.Then, COG19 makes scanning signal Vscan be changed into low level from high level.Thus, pixel Pix is (secondary Pixel SPix) value be confirmed as 0V.In more detail, the current potential of pixel electrode 22 is confirmed as 0V.Then, COG19 will be touched Touch and supplied with drive signal VcomAC to driving electrodes COML, so as to start driving electrodes COML scanning.
Timing ts 63 of the IC110 after the time as defined in being begun to pass through from timing t 62 is touched, with predetermined time interval, is led to The mutual capacitance mode detection gesture crossed between touch detection electrode TDL and driving electrodes COML.The defined time is, for example, about 32ms to 64ms.
Once touching IC110 detects defined gesture, i.e., instruction is sent to application processor in timing t 64.Receive Sleep release instruction is sent to COG19 by the application processor of instruction.
Power supply IC200 output supply voltages Vdd control will be made in timing t 64 by receiving the COG19 of sleep release instruction Signal output is to power supply IC200.Here, high power supply voltage Vdd is needed due to showing to carry out image at high speed, therefore, COG19 exports the control signal for making power supply IC200 output supply voltages Vdd to power supply IC200.
Power supply IC200 starts, from dormant recovery action, to start to boost in timing t 64, and is prolonging as defined in process Timing t 65 after the slow time supplies supply voltage Vdd to COG19.In addition, defined time delay is, for example, about 100ms. Moreover, at this moment, COG19 starts the action of backlight.Thus, the display device 1 with touch detection function can carry out image and show Show.
COG19, using the supply voltage Vdd supplied by power supply IC200, starts aobvious with touch detection function in timing t 65 Driving, the driving electrodes COML of the detection of the display and the touch that the are used for image driving for showing device 10.Moreover, touch Timing ts 66 of the IC110 after the time as defined in being begun to pass through from timing t 65, with predetermined time interval, pass through touch detection electricity Mutual capacitance mode detection gesture between pole TDL and driving electrodes COML.In addition, e.g. about 32ms of defined time is extremely 64ms。
In accordance with the above, the display device 1 with touch detection function is recovered from sleep pattern to normal operating mode.This Outside, in normal operating mode, if not having touch input in the defined time, SLEEP instruction is sent to by application processor COG19.As soon as COG19 from application processor receive SLEEP instruction, the driving of the display device 10 of stop band touch detection function, And complete image show and driving electrodes COML driving after, make power supply IC200 sleeps (stop boost).
[effect]
According to present embodiment, the display device 1 with touch detection function can make power supply IC200 direct from sleep state Recover to conventional sense, or power supply IC200 is directly changed into sleep state from conventional sense.Therefore, band touch detection function Display device 1 can suitably control power supply IC200 action, and suitably reduce power consumption.
More than, enumerate several embodiments and variation and be illustrated, still, the present invention is not limited to these realities Mode etc. is applied, various modifications can be carried out.
, can be with addition, in the display device 1 with touch detection function that the respective embodiments described above and variation are related to It will form band using the liquid crystal display device 20 of the liquid crystal of the various patterns such as FFS, IPS and the integration of touch detection device 30 and touch Touch the display device 10 of detection function.Figure 59 is the outline for representing the display device with touch detection function involved by variation The sectional view of cross-sectional configuration.Replace, the display device 10 with touch detection function that the variation shown in Figure 59 is related to Can be by TN (Twisted Nematic：Twisted-nematic), VA (Vertical Alignment：Vertical orientation), ECB (Electrically Controlled Birefringence：Electrically conerolled birefringence) etc. various patterns liquid crystal and touch detection Device integration.
As shown in figure 59, can also be on opposing substrate 3 in the case of there is driving electrodes COML on opposing substrate 3 Possess touch wiring LAC, display wiring LDC.According to the construction, (display is used with wiring LAC for driving electrodes COML and touch Wiring LDC) distance shorten.Also, the possessed scan line GCL of TFT substrate 21 and above-mentioned embodiment 1 to 5 similarly with Touch with wiring LAC, display wiring LDC crossings on different level.As a result, touch with wiring LAC in the side vertical with TFT substrate 21 Configuration is in the fringe region Gd positioned at viewing area Ad outside upwards.
In addition, in the respective embodiments described above, the touch of liquid crystal display device 20 and capacitance type is examined although being formed The so-called embedded type of the integration of device 30 is surveyed, but is not limited to this, is replaced, such as can also be that liquid crystal is installed Show the plug-in type of the touch detection device 30 of device 20 and capacitance type.In the case of plug-in type, by shown in Figure 13 Pixel substrate 2 driving electrodes COML as the first driving electrodes COML, in addition, in the glass substrate of opposing substrate 3 The second driving electrodes COML, the first driving electrodes COML and the second driving electrodes COML electrical connections are also equipped with 31 surface. In this case, external noise and the noise from liquid crystal display device transmission can also suppressed by forming above-mentioned composition Touch detection is carried out while the influence of (internal noise corresponded in the respective embodiments described above).
<2. Application Example>
Then, 60~Figure 72 of reference picture fills to the display with touch detection function illustrated by embodiment and variation 1 Application Example is put to illustrate.Figure 60~Figure 72 is to show to be applicable the display of the present embodiment with touch detection function The figure of one of the electronic equipment of device.The display device with touch detection function that embodiment 1 to 5 and variation are related to 1 can be applied to the mobile terminal devices such as television equipment, digital camera, notebook personal computer, portable phone Or the electronic equipment of all spectra such as video camera.In other words, the band that embodiment 1 to 5 and variation are related to touches inspection The display device 1 of brake can be applied to using from the signal of video signal of outside input or the signal of video signal internally generated as The electronic equipment for all spectra that image or image are shown.
(Application Example 1)
The electronic equipment shown in Figure 60 is the showing with touch detection function that embodiment 1 to 5 and variation are related to The television equipment that showing device 1 is applicable.The television equipment is for example with the image including front panel 511 and filter glass 512 Display picture portion 510, the image display picture portion 510 are the band touch detection functions that embodiment 1 to 5 and variation are related to Display device.
(Application Example 2)
The electronic equipment shown in Figure 61 and Figure 62 is the band touch detection that embodiment 1 to 5 and variation are related to The digital camera that the display device 1 of function is applicable.The digital camera for example with：The illuminating part 521 of flash of light, display Portion 522, menu switch 523 and shutter release button 524, the display part 522 are the bands that embodiment 1 to 5 and variation are related to The display device of touch detection function.As shown in Figure 61, the digital camera has lens cap 525, by sliding lens cap 525 Open and expose phtographic lens.Digital camera is by shooting from the incident light of the phtographic lens, so as to shoot digital photograph.
(Application Example 3)
The electronic equipment that is shown in Figure 63 represents embodiment 1 to 5 and variation is related to touch detection function The outward appearance for the video camera that display device 1 is applicable.The video camera for example with：Main part 531, it is arranged at the main part 531 Beginning/shutdown switch 533 and display part 534 when the subject of front side lens 532 for shooting, shooting.Also, Display part 534 is the display device with touch detection function that embodiment 1 to 5 and variation are related to.
(Application Example 4)
The electronic equipment shown in Figure 64 is the showing with touch detection function that embodiment 1 to 5 and variation are related to The notebook personal computer that showing device 1 is applicable.The notebook personal computer for example with：Main body 541, for text The keyboard 542 of the input operation of word etc. and the display part 543 of display image, display part 543 are embodiments 1 to 5 and become The display device with touch detection function that shape example is related to.
(Application Example 5)
The electronic equipment shown in Figure 65~Figure 71 is the band touch detection work(that embodiment 1 to 5 and variation are related to The pocket telephone that the display device 1 of energy is applicable.The pocket telephone for example will be upper by linking part (hinge part) 553 Side frame body 551 and lower frame 552 link, and have display 554, slave display 555, flash lamp 556 and camera 557, The display 554 or slave display 555 are the displays with touch detection function that embodiment 1 to 5 and variation are related to Device.
(Application Example 6)
Electronic equipment shown in Figure 72 is as portable personal computer, multifunctional portable telephone, can conversed just Take formula personal computer or the portable personal computer that can communicate is acted, also referred to as so-called smart phone, flat The information portable terminal of board terminal.The information portable terminal for example has display part 562 on the surface of framework 561.This is aobvious It is the display device 1 with touch detection function that embodiment 1 to 5 and variation are related to show portion 562.
<3. the composition of the present invention>
Also, the present invention can also use following composition.
(1) a kind of display device with touch detection function, there is progress image to show and carry out the routine of touch detection Operator scheme and the sleep pattern that touch detection is carried out in the case where being shown without image, possess：Viewing area, in base Multiple pixel electrodes are configured with plate rectangularly；Driving electrodes, it is oppositely arranged and is divided into multiple with pixel electrodes； Touch detection electrode, it is relative with above-mentioned driving electrodes, and formed between above-mentioned touch detection electrode and above-mentioned driving electrodes quiet Electric capacity；Display function layer, there is the image display function in above-mentioned viewing area display image；Control device, above-mentioned normal Advise under operator scheme, to apply display driving electricity based on picture signal, between pixel electrodes and above-mentioned driving electrodes Press and above-mentioned display function layer is played the mode of image display function and carry out image display control, and with to above-mentioned driving electricity Pole supply touch carries out touch detection control with the mode of drive signal；Touch detection portion, under above-mentioned normal operating mode, base In the detection signal from above-mentioned touch detection electrode, the position of the object near to or in contact with above-mentioned touch detection electrode is detected； And touch detection control unit, under above-mentioned sleep pattern, above-mentioned object is detected to the close of above-mentioned touch detection electrode or is connect Touch, wherein, under above-mentioned sleep pattern, if above-mentioned touch detection control unit detects that above-mentioned object proximity or contact are above-mentioned tactile Detecting electrode is touched, then above-mentioned control device controls pixel electrodes in defined current potential, then drives above-mentioned touch Signal is supplied to above-mentioned driving electrodes.
(2) in the display device with touch detection function described in above-mentioned (1),
Booster circuit is also equipped with, under above-mentioned normal operating mode, makes the first supply voltage liter supplied often by outside Pressure generation second source voltage, the stopping action under above-mentioned sleep pattern,
Above-mentioned control device under above-mentioned normal operating mode using above-mentioned second source voltage to pixel electrodes and Apply display driving voltage between above-mentioned driving electrodes, made under above-mentioned sleep pattern using above-mentioned first supply voltage above-mentioned Pixel electrode turns into defined current potential.
(3) in the display device with touch detection function described in above-mentioned (2), it is also equipped with：
Multi-strip scanning line, above-mentioned viewing area is arranged in a manner of extending in a first direction, and is supplied to scanning letter Number；
A plurality of pixel signal line, it is arranged in a manner of being upwardly extended in the second party intersected with above-mentioned first direction above-mentioned Viewing area, and it is supplied to picture element signal；And
Multiple transistors, the cross part of above-mentioned multi-strip scanning line and above-mentioned a plurality of pixel signal line is respectively arranged at, each Source electrode and drain electrode in a side be connected with above-mentioned pixel signal line, respective grid is connected with above-mentioned scan line, respective source The opposing party of pole and drain electrode is connected with pixel electrodes,
Wherein, above-mentioned control device supplies above-mentioned defined current potential to above-mentioned picture element signal under above-mentioned sleep pattern Line, and supplied said scanning signals to above-mentioned scan line using above-mentioned first supply voltage, under above-mentioned normal operating mode, Above-mentioned picture element signal is supplied to above-mentioned pixel signal line, and using above-mentioned second source voltage by said scanning signals supply to Above-mentioned scan line.
(4) in the display device with touch detection function described in above-mentioned (3), above-mentioned control device includes：
First grid driver, under above-mentioned normal operating mode, above-mentioned scanning is believed using above-mentioned second source voltage Number supply is to above-mentioned scan line；And
Second grid driver, under above-mentioned sleep pattern, said scanning signals are supplied using above-mentioned first supply voltage To extremely above-mentioned scan line.
(5) in the display device with touch detection function described in above-mentioned (3), above-mentioned control device drives including grid Dynamic device, above-mentioned gate drivers are supplied said scanning signals using above-mentioned second source voltage under above-mentioned normal operating mode To above-mentioned scan line, under above-mentioned sleep pattern, said scanning signals are supplied to above-mentioned using above-mentioned first supply voltage Scan line.
(6) in the display device with touch detection function described in above-mentioned (1), under above-mentioned sleep pattern, if Above-mentioned touch detection control unit detects above-mentioned object proximity or the above-mentioned touch detection electrode of contact, then above-mentioned control device so that The mode controlling power circuit of second source voltage, and profit are generated by outside the first supply voltage boosting supplied often With above-mentioned second source voltage, it is defined current potential by pixel electrodes control, then supplies above-mentioned touch with drive signal To extremely above-mentioned driving electrodes.
(7) in the display device with touch detection function described in above-mentioned (6), above-mentioned control device is in above-mentioned routine Under operator scheme, above-mentioned power circuit is controlled so that the boosting generation of above-mentioned first supply voltage is higher than above-mentioned second source voltage 3rd supply voltage, and above-mentioned 3rd supply voltage is utilized, shown to applying between pixel electrodes and above-mentioned driving electrodes Use driving voltage.
(8) in the display device with touch detection function that any one of above-mentioned (1) to (7) is recorded, above-mentioned touch inspection Control unit is surveyed under above-mentioned sleep pattern, by the self-capacitance of above-mentioned touch detection electrode, detects above-mentioned object to above-mentioned touch Detecting electrode near to or in contact with.
(9) in the display device with touch detection function that any one of above-mentioned (1) to (7) is recorded,
Above-mentioned touch detection electrode formed with multiple pairings,
Above-mentioned touch detection control unit is under above-mentioned sleep pattern, by mutual between the pairing of above-mentioned touch detection electrode Electric capacity, detect above-mentioned object to above-mentioned touch detection electrode near to or in contact with.
(10) in the display device with touch detection function that any one of above-mentioned (1) to (9) is recorded, in above-mentioned sleep Under pattern, if detecting the defined gesture based on above-mentioned object, it is changed into above-mentioned normal operating mode.With carrying out figure As display and carry out the normal operating mode of touch detection and the progress touch detection in the case where being shown without image Sleep pattern
(11) a kind of electronic equipment, possess with carry out image show and carry out touch detection normal operating mode and The display device with touch detection function of the sleep pattern of touch detection is carried out in the case where being shown without image, its In, the above-mentioned display device with touch detection function is the band touch detection work(that any one of above-mentioned (1) to above-mentioned (10) is recorded The display device of energy.
Symbol description
1 display device with touch detection function, 2 pixel substrates, 3 opposing substrates,
6 liquid crystal layers, 10 display devices with touch detection function, 11 control units,
12 gate drivers, 13 source electrode drivers, 14 driving electrodes drivers,
20 liquid crystal display devices, 21 TFT substrates, 22 pixel substrates,
30 touch detection devices, 31 glass substrates, 32 colored filters, 35 Polarizers,
40 touch detection portions, 42 touch detection signal amplifying parts, 43 A/D converter sections,
44 signal processing parts, 45 coordinate extraction units, 46 detection timing control parts,
51 scan control sections, 52 touch detection scanner sections, 53 drive divisions,
54 logic integrated circuits, 61 high level voltage generating units, 62 low level voltage generating units,
63rd, 64,66 buffer, 65 on-off circuits, 65E, 66E lead-out terminal,
70 booster circuits, 100 touch detection control units, 100D gate drivers,
110 touch IC, 200 power supply IC, VcomAC drive signals,
VcomDC, which is shown, uses driving voltage, COML driving electrodes,
TDL, TDLa, TDLb touch detection electrode, Vcom drive signals,
Vdet touch detection signals.

Claims (11)

1. a kind of display device with touch detection function, there is progress image to show and carry out the routine operation mould of touch detection Formula and the sleep pattern that touch detection is carried out in the case where being shown without image, it is characterised in that
Possess：
Viewing area, it is configured with multiple pixel electrodes rectangularly on substrate；
Driving electrodes, it is oppositely arranged and is divided into multiple with the pixel electrode；
Touch detection electrode, it is relative with the driving electrodes, and the shape between the touch detection electrode and the driving electrodes Into electrostatic capacitance；
Display function layer, there is the image display function in the viewing area display image；
Control device, under the normal operating mode, with based on picture signal, in the pixel electrode and the driving electrodes Between apply display and the display function layer is played the mode of image display function with driving voltage and carry out image display control System, and to carry out touch detection control in a manner of drive signal to driving electrodes supply touch；
Touch detection portion, under the normal operating mode, based on the detection signal from the touch detection electrode, detection connects The position of near or the contact touch detection electrode object；
And
Touch detection control unit, under the sleep pattern, the object is detected to the close of the touch detection electrode or is connect Touch,
Wherein,
Under the sleep pattern, if the touch detection control unit detects that the object proximity or described touch of contact are examined Electrode is surveyed, then the control device controls the pixel electrode in defined current potential, then by the touch drive signal Supply to the driving electrodes.
2. the display device according to claim 1 with touch detection function, it is characterised in that
Booster circuit is also equipped with, the booster circuit makes the first electricity supplied often by outside under the normal operating mode Source boost in voltage generation second source voltage, the stopping action under the sleep pattern,
The control device is under the normal operating mode using the second source voltage to the pixel electrode and described Apply display driving voltage between driving electrodes, make the pixel using first supply voltage under the sleep pattern Electrode turns into defined current potential.
3. the display device according to claim 2 with touch detection function, it is characterised in that
It is also equipped with：
Multi-strip scanning line, the viewing area is arranged in a manner of extending in a first direction, and is supplied to scanning signal；
A plurality of pixel signal line, the display is arranged in a manner of being upwardly extended in the second party intersected with the first direction Region, and it is supplied to picture element signal；And
Multiple transistors, it is respectively arranged at the cross part of the multi-strip scanning line and a plurality of pixel signal line, respective source Pole and drain electrode in a side be connected with the pixel signal line, respective grid is connected with the scan line, respective source electrode with The opposing party of drain electrode is connected with the pixel electrode,
The control device supplies the defined current potential to the pixel signal line, and utilize under the sleep pattern First supply voltage supplies the scanning signal to the scan line, under the normal operating mode, by the picture Plain signal is supplied to the pixel signal line, and is supplied the scanning signal to the scanning using the second source voltage Line.
4. the display device according to claim 3 with touch detection function, it is characterised in that
The control device includes：
First grid driver, under the normal operating mode, the scanning signal is supplied using the second source voltage To the extremely scan line；And
Second grid driver, under the sleep pattern, using first supply voltage by the scanning signal supply to The scan line.
5. the display device according to claim 3 with touch detection function, it is characterised in that
The control device includes gate drivers, and the gate drivers utilize described under the normal operating mode Two supply voltages supply the scanning signal to the scan line, under the sleep pattern, utilize first power supply electricity Pressure supplies the scanning signal to the scan line.
6. the display device according to claim 1 with touch detection function, it is characterised in that
Under the sleep pattern, if the touch detection control unit detects that the object proximity or described touch of contact are examined Survey electrode, then the control device so that by outside supply often the first supply voltage boosting and generate second source electricity The mode controlling power circuit of pressure, and be defined current potential by pixel electrode control using the second source voltage, so The touch is supplied to the driving electrodes with drive signal afterwards.
7. the display device according to claim 6 with touch detection function, it is characterised in that
The control device controls the power circuit so that first supply voltage boosts under the normal operating mode Generation threeth supply voltage higher than the second source voltage, and the 3rd supply voltage is utilized, to the pixel electrode Apply display driving voltage between the driving electrodes.
8. the display device according to claim 1 with touch detection function, it is characterised in that
The touch detection control unit detects the thing under the sleep pattern, by the self-capacitance of the touch detection electrode Body to the touch detection electrode near to or in contact with.
9. the display device according to claim 1 with touch detection function, it is characterised in that
The touch detection electrode formed with multiple pairings,
The touch detection control unit passes through the mutual capacitance between the pairing of the touch detection electrode under the sleep pattern Detect the object to the touch detection electrode near to or in contact with.
10. the display device according to claim 1 with touch detection function, it is characterised in that
Under the sleep pattern, if detecting the gesture of the object slip of specific length in the prescribed direction, turn It is changed into the normal operating mode.
11. a kind of electronic equipment, possess and show and carry out the normal operating mode of touch detection and not with carrying out image Carried out in the case that image is shown the display device with touch detection function of the sleep pattern of touch detection, its feature exists In,
The display device with touch detection function possesses：
Viewing area, it is configured with multiple pixel electrodes rectangularly on substrate；
Driving electrodes, it is oppositely arranged and is divided into multiple with the pixel electrode；
Touch detection electrode, it is relative with the driving electrodes, and the shape between the touch detection electrode and the driving electrodes Into electrostatic capacitance；
Display function layer, there is the image display function in the viewing area display image；
Control device, under the normal operating mode, with based on picture signal, to the pixel electrode and the driving electrodes Between apply display and the display function layer is played the mode of image display function with driving voltage and carry out image display control System, and to carry out touch detection control in a manner of drive signal to driving electrodes supply touch；
Touch detection portion, based on the detection signal from the touch detection electrode, detect near to or in contact with the touch detection The position of the object of electrode；And
Touch detection control unit, under the sleep pattern, the object is detected to the close of the touch detection electrode or is connect Touch,
Wherein,
Under the sleep pattern, if the touch detection control unit detects that the object proximity or described touch of contact are examined Electrode is surveyed, then the control device controls the pixel electrode in defined current potential, then by the touch drive signal Supply to the driving electrodes.
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CN104238850A (en) 2014-12-24
US9916034B2 (en) 2018-03-13
TW201506734A (en) 2015-02-16
JP2014241049A (en) 2014-12-25
US10409417B2 (en) 2019-09-10
KR20140144651A (en) 2014-12-19
JP5990134B2 (en) 2016-09-07
US20170147136A1 (en) 2017-05-25

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